| 编号 | 开局名 | 步子 |
| A00 | Anderssen's Opening | 1.a3 |
| A00 | Polish Gambit, Anderssen's Opening | 1.a3 a5 2.b4 |
| A00 | Creepy Crawly Formation | 1.a3 e5 2.h3 d5 |
| A00 | Andersspike | 1.a3 g6 2.g4 |
| A00 | Ware; Meadow Hay; Crab | 1.a4 |
| A00 | Wing Gambit, Ware Opening | 1.a4 b5 |
| A00 | Cologne Gambit, Ware Opening | 1.a4 b6 2.d4 d5 2.Nc3 Nd7 |
| A00 | Ware Gambit | 1.a4 e5 2.a5 d5 3.e3 f5 4.a6 |
| A01 | Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01 | 1.b3 |
| A01 | Symmetrical Variation, Larsen | 1.b3 b6 |
| A01 | English Variation, Larsen | 1.b3 c5 |
| A01 | Classical Variation, Larsen | 1.b3 d5 |
| A01 | Modern Variation, Larsen | 1.b3 e5 |
| A01 | Ringelbach Gambit, Larsen | 1.b3 e5 2.Bb2 f5 3.e4 |
| A01 | Paschmann Gambit, Larsen | 1.b3 e5 2.Bb2 Nc6 3.f4 |
| A01 | Dutch Variation, Larsen | 1.b3 f5 |
| A01 | Indian Variation, Larsen | 1.b3 Nf6 |
| A01 | Spike Variation, Larsen | 1.b3 Nf6 2.Bb2 g6 3.g4 |
| A00 | Polish; Orangutan; Sokolsky; Hunt | 1.b4 |
| A00 | Birmingham Gambit, Polish | 1.b4 c5 |
| A00 | Outflank Variation, Polish | 1.b4 c6 |
| A00 | Schuhler Gambit, Polish | 1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4 |
| A00 | Myers Variation, Polish | 1.b4 d5 2.Bb2 c6 3.a4 |
| A00 | Bugayev Attack, Polish | 1.b4 e5 2.a3 |
| A00 | Wolferts Gambit, Polish | 1.b4 e5 2.Bb2 c5 |
| A00 | Schiffler-Sokolsky; Tartakower Gambit | 1.b4 e5 2.Bb2 f6 3.e4 Bxb4 |
| A00 | Brinckmann Variation, Polish | 1.b4 e5 2.Bb2 f6 3.e4 Bxb4 4.Bc4 Nc6 5.f4 Qe7 6.f5 g6 |
| A00 | Bucker Defense, Polish | 1.b4 Na6 |
| A00 | Grigorian Variation, Polish | 1.b4 Nc6 |
| A00 | Polish Spike | 1.b4 Nf6 2.Bb2 g6 3.g4 |
| A00 | Karniewski; Tubingen Variation, Polish | 1.b4 Nh6 |
| A00 | Saragossa; Hempel's Opening | 1.c3 |
| A00 | Hanham; Hayward | 1.c3 e5 2.Qc2 |
| A10 | English Opening; A10 | 1.c4 |
| A10 | Halibut Gambit, English | 1.c4 b5 |
| A40 | Hartlaub Gambit, English | 1.c4 b6 2.d4 Bb7 3.Nc3 e6 4.e4 f5 5.exf5 Nf6 |
| A30 | Symmetrical Defense, English; A30 | 1.c4 c5 |
| A30 | Wing Variation, English | 1.c4 c5 2.b4 |
| A34 | Normal Variation, Symmetrical English; A34 | 1.c4 c5 2.Nc3 |
| A35 | Two Knights Variation, Symmetrical English; A35 | 1.c4 c5 2.Nc3 Nc6 |
| A36 | Fianchetto Variation, Symmetrical English; A36 | 1.c4 c5 2.Nc3 Nc6 3.g3 |
| A36 | Symmetrical Variation, Symmetrical English | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 |
| A36 | Botvinnik System Reversed, Symmetrical English | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e5 |
| A36 | Botvinnik Variation, Symmetrical English | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4 |
| A37 | Two Knights Line, Symmetrical English; A37 | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 |
| A38 | Full Symmetry Line, Symmetrical English; A38 | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 |
| A38 | Double Fianchetto, Symmetrical English | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.b3 |
| A38 | Duchamp Variation, Symmetrical English | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d3 |
| A39 | Mecking Variation, Symmetrical English; A39 | 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 |
| A34 | Fianchetto Variation, Symmetrical English | 1.c4 c5 2.Nc3 Nf6 3.g3 |
| A34 | Rubinstein Variation, Symmetrical English | 1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7 |
| A34 | Asymmetrical Variation, English | 1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5 |
| A34 | Keres-Parma System, English | 1.c4 c5 2.Nc3 Nf6 3.Nf3 e6 4.g3 Nc6 |
| A34 | Four Knights Variation, Symmetrical English | 1.c4 c5 2.Nc3 Nf6 3.Nf3 Nf6 |
| A30 | Napolitano Gambit, Symmetrical English | 1.c4 c5 2.Nf3 Nf6 3.b4 |
| A31 | Anti-Benoni Variation, Symmetrical English; A31 | 1.c4 c5 2.Nf3 Nf6 3.d4 |
| A31 | Two Knights Variation, English | 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 |
| A32 | Spielmann Defense, Symmetrical English; A32 | 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 |
| A33 | A33 | 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 |
| A33 | Geller Variation, Symmetrical English | 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6 |
| A30 | Hedgehog Variation, Symmetrical English | 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 |
| A30 | Double Fianchetto Defense, English | 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 |
| A11 | Anglo-Slav, English; A11 | 1.c4 c6 |
| A12 | A12 | 1.c4 c6 2.Nf3 d5 3.b3 |
| A12 | Bled Variation, English | 1.c4 c6 2.Nf3 d5 3.b3 Nf6 4.g3 g6 |
| A10 | Anglo Scandanavian Defense, English | 1.c4 d5 |
| A10 | Loehn Gambit, English | 1.c4 d5 2.cxd5 e6 |
| A10 | Schulz Gambit, English | 1.c4 d5 2.cxd5 Nf6 |
| A10 | Malvinas Variation, English | 1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5 |
| A20 | King's English; A20 | 1.c4 e5 |
| A20 | Kahiko-Hula Gambit, English | 1.c4 e5 2.e3 Nf6 4.f4 exf4 4.Nf3 |
| A20 | Double Whammy, English | 1.c4 e5 2.f4 |
| A20 | Drill Variation, English | 1.c4 e5 2.g3 h5 |
| A21 | Reversed Sicilian, English; A21 | 1.c4 e5 2.Nc3 |
| A21 | Kramnik-Shirov Variation, English | 1.c4 e5 2.Nc3 Bb4 |
| A21 | Troger Variation, English | 1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6 |
| A21 | Keres Defense, English | 1.c4 e5 2.Nc3 d6 3.g3 c6 |
| A21 | General Variation, King's English | 1.c4 e5 2.Nc3 d6 3.Nf3 |
| A21 | Smyslov Variation, English | 1.c4 e5 2.Nc3 d6 3.Nf3 Bg4 |
| A21 | Anglo-Dutch | 1.c4 e5 2.Nc3 f5 |
| A25 | Reversed Closed Sicilian, English; A25 | 1.c4 e5 2.Nc3 Nc6 |
| A25 | Troger Variation, English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6 |
| A25 | Taimanov Variation, English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 |
| A25 | Hungarian Attack, English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 4.Rb1 |
| A26 | Closed System, King's English; A26 | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 |
| A25 | Closed System, Full Symmetry, King's English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 |
| A25 | Botvinnik System, King's English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 |
| A25 | Bremen-Hort Variation, English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Be6 |
| A25 | Botvinnik Variation, English | 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4 |
| A27 | Three Knights System, English; A27 | 1.c4 e5 2.Nc3 Nc6 3.Nf3 |
| A28 | Four Knights Variation, English; A28 | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 |
| A28 | Korchnoi Line, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3 |
| A28 | Flexible Line, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d3 |
| A28 | Bradley Beach Variation, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 e4 |
| A28 | Four Knights Variation, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 exd4 5.Nxd4Bb4 6.Bg5 h6 7.Bh4 Bxc3+ 8.bxc3 Ne5 |
| A28 | Quiet Line, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 |
| A28 | Romanishin Variation, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3 |
| A28 | Keene; Stean Variation, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 O-O 6.Nd5 Re8 7.Qf5 |
| A28 | Botvinnik Line, English | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e4 |
| A29 | Fianchetto Line, Four Knights English; A29 | 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 |
| A22 | Two Knights Variation, English; A22 | 1.c4 e5 2.Nc3 Nf6 |
| A22 | Mazedonisch Variation, English | 1.c4 e5 2.Nc3 Nf6 3.f4 |
| A22 | Bremen; Carls Variation, English | 1.c4 e5 2.Nc3 Nf6 3.g3 |
| A22 | Kapengut; Smyslov; Modern V, English | 1.c4 e5 2.Nc3 Nf6 3.g3 Bb4 |
| A23 | Keres Variation, English; A23 | 1.c4 e5 2.Nc3 Nf6 3.g3 c6 |
| A23 | Reversed Dragon, English | 1.c4 e5 2.Nc3 Nf6 3.g3 d5 |
| A24 | Fianchetto Lines, Two Knights Variation, English; A24 | 1.c4 e5 2.Nc3 Nf6 3.g3 g6 |
| A24 | Prickly Pawn Pass System, English | 1.c4 e5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 O-O 7.Nge2 c6 8.O-O a6 |
| A22 | Bellon Gambit, English | 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 b5 |
| A22 | Erbenheimer Gambit, English | 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 Ng4 |
| A20 | Nimzovich Variation, English | 1.c4 e5 2.Nf3 |
| A20 | Nimzovich-Flohr Variation, English | 1.c4 e5 2.Nf3 e4 |
| A20 | English Queen | 1.c4 e5 2.Qa4 |
| A13 | Agincourt; Kurajica Defense, English; A13 | 1.c4 e6 |
| A13 | English Defense | 1.c4 e6 2.d4 b6 |
| A13 | King's Knight Variation, English | 1.c4 e6 2.Nf3 d5 |
| A13 | Wimpy System, English | 1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 e3 |
| A13 | Afincourt Variation, English | 1.c4 e6 2.Nf3 d5 3.g3 |
| A13 | Kurajica Defense, English | 1.c4 e6 2.Nf3 d5 3.g3 c6 |
| A13 | Neo Catalan, English | 1.c4 e6 2.Nf3 d5 3.g3 Nf6 |
| A14 | A14 | 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 |
| A14 | Neo Catalan Declined, English | 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O |
| A14 | Keres Defense, English | 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O c5 6.cxd5 Nxd5 7.Nc3 Nc6 |
| A13 | Neo Catalan Accepted, English | 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 |
| A13 | Romanishin Gambit, English | 1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5 |
| A10 | Anglo-Dutch Defense | 1.c4 f5 |
| A10 | Anglo-Polish Dutch | 1.c4 f5 2.b4 |
| A10 | Hickmann Gambit, English | 1.c4 f5 2.e4 |
| A10 | Hickmann Gambit, English | 1.c4 f5 2.e4 fxe4 3.d3 |
| A10 | Porcupine Variation, English | 1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4 |
| A10 | Wade Gambit, English | 1.c4 f5 2.g4 |
| A10 | English Spike | 1.c4 f5 2.g4 |
| A10 | Chabanon Gambit, English | 1.c4 f5 2.Nf3 d6 3.e4 |
| A10 | Myers Defense, English | 1.c4 g5 2.d4 Bg7 |
| A10 | Zilbermints Gambit, English | 1.c4 g5 2.d4 e5 |
| A10 | Great Snake, English | 1.c4 g6 |
| A10 | Adorjan System, English | 1.c4 g6 2.e4 e5 |
| A10 | Beefeater | 1.c4 g6 2.Nc3 Bg7 3.d4 c5 4.d5 Bxc3 5.bxc3 f5 |
| A10 | Anglo-Lithuanian Variation, English | 1.c4 Nc6 |
| A15 | Anglo System, English; A15 | 1.c4 Nf6 |
| A15 | Mikenas-Carls Variation, English | 1.c4 Nf6 |
| A15 | English Orangutan | 1.c4 Nf6 2.b4 |
| A15 | Shirazi Shove | 1.c4 Nf6 2.g3 h5 |
| A16 | A16 | 1.c4 Nf6 2.Nc3 |
| A16 | Golombek Defense, English; Anti English | 1.c4 Nf6 2.Nc3 d5 |
| A16 | Czech Variation, English | 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6 |
| A17 | Smyslov Defense, English | 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3 |
| A16 | Korchnoi's Variation, English | 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5 |
| A16 | Stein Attack, English | 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.Qa4+ |
| A17 | Hegehog System, Anglo-Indian English; A17 | 1.c4 Nf6 2.Nc3 e6 |
| A18 | Flohr-Mikenas-Carls Variation, English; A18 | 1.c4 Nf6 2.Nc3 e6 3.e4 |
| A19 | Floh-Mikenas-Carls Variation, English; A19 | 1.c4 Nf6 2.Nc3 e6 3.e4 c5 |
| A19 | Nei Gambit, English | 1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8 |
| A18 | Kevitz Defense, English | 1.c4 Nf6 2.Nc3 e6 3.e4 Nc6 |
| A18 | Queen's Indian Formation, English | 1.c4 Nf6 2.Nc3 e6 3.Nf3 b6 |
| A17 | Nimzo-English Opening | 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 |
| A17 | Zviagintsev-Krasenkov Attack, English | 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4 |
| A16 | Anti-anti-grunfeld | 1.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4 |
| A15 | King's Knight Variation, English | 1.c4 Nf6 2.Nf3 |
| A15 | Romanishin Variation, English | 1.c4 Nf6 2.Nf3 e6 3.g3 a6 |
| A00 | Mieses; Valencia; Venezuelan Opening | 1.d3 |
| A00 | Venezolana | 1.d3 c5 2.Nc3 Nc6 3.g3 |
| A00 | Reversed Rat | 1.d3 e5 |
| A00 | Spike Deferred; Myers Spike Attack | 1.d3 g6 2.g4 |
| A40 | Queen Pawn Opening; A40 | 1.d4 |
| A40 | St George's Gambit | 1.d4 a6 2.c4 b5 3.e4 e6 4.cxb5 axb5 |
| A40 | Polish Defense | 1.d4 b5 |
| A40 | Spassky Gambit, Polish Defense | 1.d4 b5 2.e4 Bb7 3.Bxb5 |
| A40 | Queen Fianchetto, Queen Pawn Game | 1.d4 b6 |
| A40 | Eastbourne Gambit | 1.d4 b6 2.c4 Bb7 3.Bxb5 |
| A43 | Staunton Defense; Benoni C-G; A43 | 1.d4 c5 |
| A43 | Zilbermints Gambit; Nakamura Gambit, Benoni | 1.d4 c5 2.b4 cxb4 |
| A43 | Old Benoni | 1.d4 c5 2.d5 d6 |
| A43 | Schmid Variation, Benoni | 1.d4 c5 2.d5 d6 3.Nc3 g6 |
| A44 | Pawn Thrust, Benoni; A44 | 1.d4 c5 2.d5 e5 |
| A44 | Blockade Variation; Semi-Benoni; Russian Variation | 1.d4 c5 2.d5 e5 3.e4 d6 |
| A43 | Franco-Benoni; Franco-Sicilian | 1.d4 c5 2.d5 e6 3.e4 |
| A43 | Clarendon Court Variation, Benoni | 1.d4 c5 2.d5 f5 |
| A43 | Benoni-Staunton Gambit | 1.d4 c5 2.d5 f5 3.e4 |
| A43 | Snail Variation, Benoni | 1.d4 c5 2.d5 Na6 |
| A43 | Benoni-Indian Defense | 1.d4 c5 2.d5 Nf6 |
| A56 | Vulture Defense, Benoni | 1.d4 c5 2.d5 Nf6 3.c4 Ne4 |
| A43 | Woozle Defense, Benoni | 1.d4 c5 2.d5 Nf6 3.Nc3 Qa5 |
| A43 | Kingside move order, Benoni | 1.d4 c5 2.d5 Nf6 3.Nf3 |
| A43 | Habichd; Hawk Variation, Benoni | 1.d4 c5 2.d5 Nf6 3.Nf3 c4 |
| A43 | Hawk Variation, Benoni | 1.d4 c5 2.d5 Nf6 3.Nf3 e4 |
| A43 | Benoni Gambit Accepted | 1.d4 c5 2.dxc5 |
| A43 | Cormorant Gambit, Benoni | 1.d4 c5 2.dxc5 b6 |
| A43 | Schlenker Defense, Benoni | 1.d4 c5 2.dxc5 Na6 |
| A43 | Zilbermints-Benoni Gambit | 1.d4 c5 2.Nf3 cxd4 3.b4 |
| A43 | Tamarkin Countergambit, Benoni | 1.d4 c5 2.Nf3 cxd4 3.b4 e5 |
| A41 | Anglo-Slav Opening | 1.d4 c6 2.c4 d6 |
| D00 | Queen Pawn Game; Close Opening; D00 | 1.d4 d5 |
| D00 | Sarratt Attack | 1.d4 d5 2.Bf4 |
| D00 | Steinitz Countergambit, Queen Pawn Game | 1.d4 d5 2.Bf4 c5 |
| D00 | Morris Gambit | 1.d4 d5 2.Bf4 c5 3.e4 |
| D00 | Morris Counter-Gambit | 1.d4 d5 2.Bf4 c5 3.e4 dxe4 |
| D00 | Bishop Attack; Levitsky Attack, Queen Pawn Game | 1.d4 d5 2.Bg5 |
| D00 | Zot | 1.d4 d5 2.Bg5 |
| D00 | Welling Variation, Queen Pawn Game | 1.d4 d5 2.Bg5 Bg4 |
| D00 | Euwe Variation, Queen Pawn Game | 1.d4 d5 2.Bg5 h6 3.Bh4 c6 4.Nf3 Qb6 |
| D06 | Queen's Gambit; Aleppo Gambit; D06 | 1.d4 d5 2.c4 |
| D06 | Zilbermints Gambit, QGD | 1.d4 d5 2.c4 b5 |
| D06 | Brieger Defense; Sahovic Defense, QGD; Baltic Defense | 1.d4 d5 2.c4 Bf5 |
| D31 | Baltic Defense, QGD | 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6 |
| D31 | Argentinian Gambit, QGD | 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6 6.Rxb1 Qxd4 |
| D06 | Pseudo-Slav, QGD | 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 c6 |
| D06 | Pseudo-Chigorin, QGD | 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 Nc6 |
| D06 | Queen Attack, Baltic Defens, QGD | 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Qb3 |
| D06 | Austrian Defense; Summetrical Defense, QGD | 1.d4 d5 2.c4 c5 |
| D06 | Gusev Countergambit, QGD | 1.d4 d5 2.c4 c5 3.cxd5 Nf6 |
| D06 | Haberditz Variation, QGD | 1.d4 d5 2.c4 c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Qa5+ |
| D06 | Salvio Countergambit, QGD | 1.d4 d5 2.c4 c5 3.dxc5 d4 |
| D10 | Slav Defense; Czech Defense, QGD; D10 | 1.d4 d5 2.c4 c6 |
| D10 | Exchange Variation, Slav | 1.d4 d5 2.c4 c6 3.cxd5 |
| D10 | Slav Pawn Game | 1.d4 d5 2.c4 c6 3.e3 |
| D10 | Diemer Gambit, Slav | 1.d4 d5 2.c4 c6 3.e4 |
| D10 | Alekhine Attack, Slav | 1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4 |
| D10 | Winawer Counter Gambit, Slav | 1.d4 d5 2.c4 c6 3.Nc3 e5 |
| D10 | Anti-Winawer Gambit, Slav | 1.d4 d5 2.c4 c6 3.Nc3 e5 4.e4 |
| D11 | Modern Line, Slav; D11 | 1.d4 d5 2.c4 c6 3.Nf3 |
| D11 | Slav Bishop's Game | 1.d4 d5 2.c4 c6 3.Nf3 Bf5 |
| D11 | Bonet Gambit, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Bg5 |
| D13 | Exchange Variation, Slav; D13 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 |
| D14 | Symmetrical Line, Slav; D14 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 |
| D14 | Trifunovic Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3 e6 8.Qb3 Bb4 |
| D11 | Quiet Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 |
| D12 | Schallopp Defense, Slav; D12 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 |
| D12 | Amsterdam Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Nc3 |
| D12 | Rotterdam Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 |
| D12 | Landau Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 Qc8 7.Bd2 e6 8.Na3 |
| D12 | Pin Defense, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4 |
| D11 | Breyer Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nbd2 |
| D15 | Three Knights Variation, Slav; D15 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 |
| D15 | Chameleon Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 |
| D15 | Advance System, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 c5 |
| D15 | Two Knights Attack, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 |
| D16 | Alapin Variation, Slav; D16 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 |
| D17 | Czech Defense; Open Slav Defense; D17 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 |
| D18 | Dutch Variation, Slav; D18 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 |
| D19 | Main Line, Czech Variation, Slav; D19 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O O-O 9.Qe2 |
| D18 | Mareschall Variation, Slav; Lasker Variation | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 Na6 |
| D17 | Krause Attack, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 |
| D17 | Wiesbaden Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 |
| D17 | Sharp Line, Wiesbaden Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4 8.e4 |
| D17 | Fazekas Gambit, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Na6 7.e4 |
| D17 | Carlsbad Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 |
| D17 | Baarn Variation, Slav; Bled Attack | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Nh4 |
| D16 | Steiner Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4 |
| D16 | Soultanbeieff Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6 |
| D16 | Smyslov Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Na6 |
| D15 | Alekhine Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 |
| D15 | Alekhine Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 b5 6.a4 b4 |
| D15 | Geller Variation; Geller-Tolush Var, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4 |
| D15 | Schlechter Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6 |
| D15 | Suchting Variation, Slav | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Qb6 |
| D20 | Queen's Gambit Accepted; D20 | 1.d4 d5 2.c4 dxc4 |
| D20 | Old Variation, QGA | 1.d4 d5 2.c4 dxc4 3.e3 |
| D20 | Billinger Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.a3 |
| D20 | Korchnoi Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Kf1 |
| D20 | Novikov Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nd2 |
| D20 | Christensen Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nf3 |
| D20 | Saduleto Variation, QGA; Central Variation, QGA | 1.d4 d5 2.c4 dxc4 3.e4 |
| D20 | Greco Variation, QGA | 1.d4 d5 2.c4 dxc4 3.e4 b5 |
| D20 | Rubinstein Variation, QGA | 1.d4 d5 2.c4 dxc4 3.e4 c5 |
| D20 | Yefimov Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 b5 |
| D20 | Linares Variation, QGA | 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 Nf6 5.Nc3 b5 |
| D20 | McDonnell Defense, QGA | 1.d4 d5 2.c4 dxc4 3.e4 e5 |
| D20 | Somov Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.e4 e5 4.Bxc4 |
| D01 | Betbeder; Veresov; Levitzky; Parisian | 1.d4 d5 2.c4 dxc4 3.e4 f5 |
| D20 | Versov; Betbeder; Schwartz Defense, QGA | 1.d4 d5 2.c4 dxc4 3.e4 f5 |
| D20 | Modern Defense, QGA | 1.d4 d5 2.c4 dxc4 3.e4 Nc6 |
| D20 | Alekhine System, QGA | 1.d4 d5 2.c4 dxc4 3.e4 Nf6 |
| D20 | Gunsberg Defense; Prianishenmo Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.Nc3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5 |
| D21 | Blackburne's Move, QGA; Normal Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 |
| D21 | Alekhine Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 a6 |
| D22 | D22 | 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 |
| D22 | Haberditz Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 b5 |
| D22 | Alekhine Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 Bg4 |
| D22 | Borisenko-Furman Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e4 |
| D21 | Slav Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 b5 |
| D21 | Gunsberg Defense, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 c5 |
| D21 | Prianishenmo Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5 |
| D21 | Rosenthal Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 e6 |
| D21 | Godes Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nd7 |
| D23 | D23 | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 |
| D25 | D25 | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 |
| D25 | Flohr; Winawer Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Be6 |
| D25 | Larsen; Janowski; Modern Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4 |
| D26 | Traditional System QGA; D26 | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 |
| D26 | Classical Defense, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 |
| D27 | Rubinstein Variation, QGA; D27 | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 |
| D27 | Furman Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5 |
| D27 | Russian Gambit, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.e4 |
| D28 | Alekhine System, Classical Defense, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 |
| D28 | Accelerated Fianchetto, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 |
| D29 | D29 | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 |
| D29 | Smyslov Variation, Classical Defense, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.Rd1 Nbd7 10.Nc3 Bd6 |
| D28 | Counter Fianchetto Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 Nc6 8.dxc5 |
| D28 | Four Knights Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 Nc6 8.Nc3 |
| D26 | Steinitz Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O cxd4 |
| D26 | Development Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O Nc6 |
| D25 | Smyslov Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 g6 |
| D24 | Showalter Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 |
| D24 | Bogoljubow Defense, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4 |
| D23 | Mannheim Variation, QGA | 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+ |
| D08 | Albin Countergambit; Cavalotti Var, QGD | 1.d4 d5 2.c4 e5 |
| D08 | Lasker Trap, QGD | 1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3 |
| D08 | Normal Line, Albin Countergambit, QGD | 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 |
| D08 | Tartakower Defense, QGD | 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 c5 |
| D09 | Fianchetto Variation, Albin Countergambit; D09 | 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 |
| D08 | Alapin Variation, QGD | 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2 |
| D30 | D30 | 1.d4 d5 2.c4 e6 |
| D31 | Queen's Knight Variation, QGD; D31 | 1.d4 d5 2.c4 e6 3.Nc3 |
| D31 | Janowski Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 a6 |
| D31 | Alapin Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 b6 |
| D31 | Alatortsev; Petrosian, Charousek Var, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Be7 |
| D31 | Miladinovic Gambit, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.e4 dxe4 5.f3 |
| D32 | Tarrasch Defense, QGD; D32 | 1.d4 d5 2.c4 e6 3.Nc3 c5 |
| D32 | Schara-Hennig; Duisburg Gambit, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 |
| D32 | Von Hennig Gambit, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6 |
| D32 | Tarrasch Gambit, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.dxc5 d4 6.Na4 b5 |
| D32 | Marshall Gambit, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.e4 |
| D32 | Two Knights Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 |
| D32 | Grunfeld Gambit, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.dxc5 d4 7.Na4 b5 |
| D33 | Lodz; Schlecter; Rubinstein Var, QGD; D33 | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 |
| D33 | Folkestone; Swedish Var, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 c4 |
| D33 | Prague Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 |
| D34 | D34 | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 |
| D34 | Rubinstein; Normal Position, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O |
| D34 | Carlsbad Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 |
| D34 | Endgame Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 Be6 |
| D34 | Bogoljubow Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 Be6 10.Rc1 c4 |
| D34 | Advance Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 c4 |
| D34 | Spassky Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 cxd4 10.Nxd4 |
| D34 | Reti Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.dxc5 Bxc5 10.Na4 |
| D34 | Classical Tarrasch Gambit | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.dxc5 d4 |
| D33 | Wagner Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Bg4 |
| D32 | Symmetrical Variation, Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6 |
| D31 | Semi-Slav Defense | 1.d4 d5 2.c4 e6 3.Nc3 c6 |
| A84 | Slav Stonewall, Dutch | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 |
| D31 | Portisch Gambit, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.g4 |
| D31 | Marshall Gambit, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 |
| D31 | Gunderam Gambit, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.f3 |
| D31 | Tolush Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+8.Be2 c5 9.Bxc5 Qxg2 |
| D31 | Noteboom Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 |
| D31 | Abrahams; Noteboom; Klaus Junge Var, QGD | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 a5 |
| D31 | Anti-Noteboom Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 |
| D31 | Beliavsky Line, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 f6 |
| D35 | D35 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 |
| D35 | Harrwitz; Rubinstein Var, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bf4 |
| D50 | Modern Variation, QGD; D50 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 |
| D53 | D53 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 |
| D53 | Heral Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6 |
| D53 | Lasker Defense, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Ne4 |
| D55 | D55 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 |
| D55 | Pillsbury Attack, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 b6 7.Bd3 Bb7 8.cxd5 exd5 9.Ne5 |
| D55 | Neo Orthodox Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 |
| D56 | D56 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 |
| D58 | Tartakower Variation, QGD; D58 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6 |
| D59 | Exchange Variation, Tartakower Defense, QGD; D59 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6 8.cxd5 Nxd5 |
| D56 | Lasker Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 |
| D57 | D57 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5 |
| D57 | Bernstein Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3 |
| D56 | Teichmann Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.Qc2 |
| D55 | Anti-Tartakower Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6 |
| D55 | Petrosian Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6 Bxf6 8.Rc1 c6 9.Bd3 Nd7 10.O-O dxc4 |
| D60 | Orthodox Variation, QGD; D60 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 |
| D60 | Botvinnik Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Bd3 |
| D60 | Rauzer Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qb3 |
| D61 | Rubinstein Variation, Orthodox Defense, QGD; D61 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2 |
| D62 | D62 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2 c5 8.cxd5 |
| D63 | D63 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 |
| D63 | Henneberger; Swiss Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 a6 |
| D63 | Capablanca Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bb5 |
| D63 | Pillsbury Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bd3 |
| D63 | Rubinstein Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 |
| D66 | D66 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 |
| D66 | Fianchetto Variation, Orthodox Defense, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 b5 |
| D67 | Capablanca Freeing Maneuver, QGD; D67 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 |
| D67 | Alekhine Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.Ne4 |
| D67 | Classical Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 |
| D68 | D68 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 |
| D69 | D69 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 13.dxe5 |
| D64 | Janowski Variation, Orthodox Defense, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.h4 |
| D64 | Rubinstein Attack, Orthodox Defense, QGD; D64 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2 |
| D65 | D65 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2 a6 9.cxd5 |
| D54 | Neo-Orthodox Variation, QGD; D54 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Rc1 |
| D50 | Uhlmann Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 h6 6.Bh4 O-O 7.Rc1 dxc4 |
| D50 | Been & Koomen; Dutch & Peruvian | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 |
| D50 | Pseudo-Tarrasch Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 |
| D50 | Canal; Venice Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 Qb6 |
| D50 | Primitive Pillsbury Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.Nf3 cxd4 6.Qxd4 |
| D51 | Knight Defense, QGD; D51 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 |
| D51 | Manhattan; Westphalia Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 |
| D51 | Westphalian Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 6.Nf3 c5 |
| D52 | D52 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 |
| D52 | Cambridge Springs; Pillsbury Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 |
| D52 | Bogoljubov Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2 |
| D52 | Argentine Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2 O-O 9.Bh4 |
| D51 | Alekhine Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 c6 6.e4 |
| D51 | Alekhine Gambit, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 h6 6.Bh4 dxc4 |
| D35 | Exchange Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 |
| D35 | Positional Variation, Exchange Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 |
| D36 | Reshevsky Variation, QGD; D36 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2 |
| D35 | Saemisch Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Nf3 Nbd7 6.Bf4 |
| D37 | Three Knights Variation, QGD; D37 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 |
| D38 | Ragozin Variation, QGD; D38 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 |
| D39 | Vienna Variation, QGD; D39 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5 dxc4 |
| D38 | Alekhine Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Qa4 |
| D37 | Harrwitz Attack, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bf4 |
| D40 | Semi-Tarrasch Variation, QGD; D40 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 |
| D40 | Pillsbury Variation, Semi-Tarrasch | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5 |
| D41 | D41 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 |
| D42 | D42 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bd3 |
| D41 | San Sebastian Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ |
| D43 | D43 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 |
| D43 | Anti-Meran Gambit, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 |
| D44 | Semi-Slav Defense Accepted; D44 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 |
| D44 | Botvinnik Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 |
| D44 | Ekstrom Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.exf6 gxh4 10.Ne5 |
| D44 | Lilienthal Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 |
| D44 | Alatortsev System, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 Nd5 |
| D44 | Anti-Moscow Gambit | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 h6 6.Bh4 |
| D45 | D45 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 |
| D45 | Acclerated Meran, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 a6 |
| D45 | Normal Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 |
| D46 | D46 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 |
| D46 | Romi Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bb4 |
| D46 | Chigorin Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bd6 |
| D46 | Bogoljubow Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Be7 |
| D47 | Meran Variation, QGD; D47 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 |
| D48 | Reynolds Variation, QGD; D48 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 |
| D48 | Pirc Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 b4 |
| D48 | Old Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 |
| D49 | Blumenfeld Variation, QGD; D49 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 |
| D49 | Sozin Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 |
| D49 | Stahlberg Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5 |
| D48 | Reynolds Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 d5 |
| D48 | Old Meran Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.O-O |
| D47 | Lundin; Neo-Meran | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 |
| D47 | Wade Variation, QGD | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 |
| D47 | Larsen Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5 |
| D45 | Rubinstein; anti-Meran | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Ne5 |
| D45 | Stoltz Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 |
| D45 | Center Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 |
| D45 | Mikhalchishin Line, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 Nxe4 9.Qxe4 e5 10.dxe5 |
| D45 | Shabalov Attack, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.g4 |
| D44 | Stonewall Defense, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Ne4 6.Bd3 f5 |
| D44 | Vienna Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 dxc4 |
| D30 | Pseudo-Tarrasch, QGD | 1.d4 d5 2.c4 e6 3.Nf3 c5 |
| D30 | Bishop Attack, Tarrasch | 1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.Bg5 |
| D30 | Anti-Noteboom Gambit, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nf3 c6 4.Nc3 dxc4 5.g3 |
| D30 | Traditional Variation, QGD | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 |
| D30 | Vienna Variation, QGD | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Bb4+ |
| D30 | Duras Variation, QGD; Capablanca Variation | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6 |
| D30 | Hastings Variation, QGD | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6 5.Bxf6 Qxf6 6.Nc3 c6 7.Qb3 |
| D30 | Capablanca Variation, QGD | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nbd2 |
| D30 | Pseudo-Meran; Semi-Slav, QGD | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 |
| D30 | Quiet Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 |
| D30 | Semmering Variation, Semi-Slav | 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 c5 |
| D06 | Alekhine Defense, QGD | 1.d4 d5 2.c4 g6 |
| D07 | Chigorin Defense, QGD; D07 | 1.d4 d5 2.c4 Nc6 |
| D07 | Exchange Variation, Chigorin Defense | 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 |
| D07 | Costa's Line | 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 4.e3 e5 5.Nc3 Bb4 6.Bd2 Bxc3 7.Bxc3 exd4 8.Ne2 |
| D07 | Janowski Variation, QGD | 1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 4.Nf3 |
| D06 | Tartakower Gambit, QGD | 1.d4 d5 2.c4 Nc6 3.Nc3 e5 |
| D06 | Modern Gambit, Chigorin Defense | 1.d4 d5 2.c4 Nc6 3.Nc3 Nf6 4.Nf3 dxc4 |
| D06 | Alekhine Variation, Chigorin Defense | 1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 4.Qa4 |
| D06 | Lazard Gambit, Chigorin Defense | 1.d4 d5 2.c4 Nc6 3.Nf3 e5 |
| D06 | Marshall Defense; Knight Defense, QGD | 1.d4 d5 2.c4 Nf6 |
| D06 | Cocquio Counter Gambit, QGD; Tan Gambit | 1.d4 d5 2.c4 Nf6 3.cxd5 c6 |
| D00 | Stonewall Attack, Queen Pawn Game | 1.d4 d5 2.e3 Nf6 3.Bd3 |
| D00 | Stonewall Attack | 1.d4 d5 2.e3 Nf6 3.Bd3 c5 4.c3 |
| D00 | Blackmar-Diemer Gambit | 1.d4 d5 2.e4 |
| D00 | Fritz Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Bc4 |
| D00 | Diemer-Rosenberg Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Be3 |
| D00 | Blackmar Gambit; Gedult Gambit | 1.d4 d5 2.e4 dxe4 3.f3 |
| D00 | Pohlmann Variation, BDG | 1.d4 d5 2.e4 dxe4 3.f3 f5 |
| D00 | Mieses; Nimzovich Var, BDG | 1.d4 d5 2.e4 dxe4 3.f3 Nc6 |
| D00 | Polish Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 |
| D00 | Grosshans Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Bd7 |
| D00 | Zeller Defesne, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 |
| D00 | Zeller Defesne, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 exf3 5.Qxf3 Bc8 |
| D00 | Soller Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 Nf6 5.Bc4 |
| D00 | Dries Counter-Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 c5 |
| D00 | Lemberger Counter-Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e5 |
| D00 | Soller; Lemberger Var, BDG; Diemer Attack | 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Be3 |
| D00 | Endgame Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.dxe5 |
| D00 | Rasmussen Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nge2 |
| D00 | Lange Gambit; Alfred Lange Gambit; Simple Variation | 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 |
| D00 | Sneiders Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Qh5 |
| D00 | Rasa-Studier Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.Be3 |
| D00 | Giertz-Peters Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3 |
| D00 | Polish Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3 Bf5 5.Bg5 |
| D00 | Netherlands Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 f5 |
| D00 | Mieses; Nimzovich Var, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nc6 |
| D00 | Vienna Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 |
| D00 | Studier-Rasa Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Be3 |
| D00 | Von Popiel Gambit | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 |
| D00 | Zilbermints Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 Bf5 5.Bxf6 exf6 6.g4 Bg6 7.Qe2 Bb4 8.Qb5+ |
| D00 | Blackmar-Diemer Gambit | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 |
| D00 | Wiesengren Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bc5 |
| D00 | Hans Mullers; Vienna V | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 |
| D00 | Soller; Vienna Var, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bc4 |
| D00 | Tejler Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bf4 |
| D00 | Sperling Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.d5 |
| D00 | Diemer Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.fxe4 |
| D00 | Kampars Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.g5 Nd5 7.fxe4 |
| D00 | Gunderam Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.h4 |
| D00 | Brombacher; Daberitz Var, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5 |
| D00 | O'Kelly Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c6 |
| D00 | Langeheinecke Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e3 |
| D00 | Elbert Counter-Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e5 |
| D00 | Weinsbach Declination, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 |
| D00 | Pfrang Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 5.fxe4 Bb4 6.Bd3 Bxc3+ 7.bxc3 Nxe4 8.Be3 |
| D00 | Ritter Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 b6 |
| D00 | Gunderam; Tartakower Var, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5 |
| D00 | Teichmann Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 |
| D00 | Kaulich Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c5 |
| D00 | Ziegler; Gunderam's 2nd Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 |
| D00 | Euwe Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 |
| D00 | Zilbermints Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nc6 8.O-O Nxd4 9.Kh1 |
| D00 | Duthilleuk Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bd3 Nc6 7.Bg5 Be7 8.Ne4 |
| D00 | Bogoljubow Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 |
| D00 | Mad Dog Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.h4 |
| D00 | Nimzovich Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.Ne5 |
| D00 | Kloss Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Kh1 |
| D00 | Studier Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Qe1 |
| D00 | Diemer Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bf4 |
| D00 | Peters Attack, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Ne5 |
| D00 | Gunderam Defense, BDG; Rook Pawn Defense | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 h5 |
| D00 | Schuttler Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nbd7 |
| D00 | Pietrowsky Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nc6 |
| D00 | Ryder Variation, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 |
| D00 | Tautvaisis Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Nc6 |
| D00 | Tejler Gambit, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Be3 Qg4 7.Qf2 Ne4 8.Nxe4 Qxe4 9.O-O-O Nc6 10.Bd3 |
| D00 | Albrecht; Karlshruhle Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 g6 |
| D00 | Lamb Defense, BDG | 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Nc6 |
| D00 | Mason Attack, Queen Pawn Game | 1.d4 d5 2.f4 |
| D00 | Zurich Gambit | 1.d4 d5 2.g4 |
| D00 | Chigorin; Ponziani; Veresov | 1.d4 d5 2.Nc3 |
| D00 | Alburt Defense, QP | 1.d4 d5 2.Nc3 Bf5 |
| D00 | Anti-Veresov | 1.d4 d5 2.Nc3 Bg4 |
| D00 | Irish Gambit, QP | 1.d4 d5 2.Nc3 c5 |
| D00 | Shaviliuk Gambit, QP | 1.d4 d5 2.Nc3 e5 |
| D00 | Dutch System, QP | 1.d4 d5 2.Nc3 f5 |
| D00 | Fianchetto Defense, QP | 1.d4 d5 2.Nc3 g6 3.Nf3 Bg7 |
| D00 | Shropshire Defense | 1.d4 d5 2.Nc3 h5 |
| D01 | Richter-Veresov Opening; D01 | 1.d4 d5 2.Nc3 Nf6 3.Bg5 |
| D01 | Veresov Variation, QP | 1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.Bxf6 |
| D01 | Richter Variation, Veresov | 1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.f3 |
| D01 | Classical Defense, Veresov | 1.d4 d5 2.Nc3 Nf6 3.Bg5 e6 4.Nf3 |
| D01 | Two Knights System, Veresov | 1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3 |
| D01 | Grunfeld Defense, Veresov | 1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3 g6 |
| D01 | Boyce Defense, Veresov | 1.d4 d5 2.Nc3 Nf6 3.Bg5 Ne4 |
| D00 | Hubsch Gambit | 1.d4 d5 2.Nc3 Nf6 3.e4 Nxe4 |
| D02 | Zukertort Variation, QP; D02 | 1.d4 d5 2.Nf3 |
| D02 | Anti-Torre, QP | 1.d4 d5 2.Nf3 Bg4 |
| D02 | Anti-Torre | 1.d4 d5 2.Nf3 Bg4 3.Ne5 Bf5 4.g4 |
| D02 | Queen's Gambit Reversed; Krause Variation | 1.d4 d5 2.Nf3 c5 |
| D02 | Chandler Gambit, QP | 1.d4 d5 2.Nf3 c5 3.g3 cxd4 4.Bg2 |
| D02 | Chigorin Variation, QP | 1.d4 d5 2.Nf3 Nc6 |
| D02 | Symmetrical Variation, QP | 1.d4 d5 2.Nf3 Nf6 |
| D02 | London System; Queen's Bishop Opening | 1.d4 d5 2.Nf3 Nf6 3.Bf4 |
| D02 | Poisoned Pawn Variation, QP | 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Qb6 5.Nc3 |
| D03 | Torre Attack, QP; D03 | 1.d4 d5 2.Nf3 Nf6 3.Bg5 |
| D03 | Breyer Variation, QP | 1.d4 d5 2.Nf3 Nf6 3.Bg5 e6 4.e3 c5 5.c3 Qb6 |
| D03 | Grunfeld Variation, QP | 1.d4 d5 2.Nf3 Nf6 3.Bg5 g6 |
| D03 | Gossip Variation, QP | 1.d4 d5 2.Nf3 Nf6 3.Bg5 Ne4 |
| D02 | Zilbermints Variation, QP | 1.d4 d5 2.Nf3 Nf6 3.c4 b5 |
| D25 | Queen's Gambit Accepted Deferred | 1.d4 d5 2.Nf3 Nf6 3.c4 dxc4 |
| D04 | Colle System; D04 | 1.d4 d5 2.Nf3 Nf6 3.e3 |
| D04 | Bishop Defense, QP; Anti-Colle | 1.d4 d5 2.Nf3 Nf6 3.e3 Bf5 |
| D05 | Classical Defense, Colle System; D05 | 1.d4 d5 2.Nf3 Nf6 3.e3 e6 |
| D05 | Zukertort Variation, QP | 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 |
| D05 | Rubinstein Attack, Colle | 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.b3 |
| D02 | Pseudo-Catalan | 1.d4 d5 2.Nf3 Nf6 3.g3 |
| D00 | Amazon Attack | 1.d4 d5 2.Qd3 |
| D00 | Siberian Attack | 1.d4 d5 2.Qd3 Nc6 3.Nc3 |
| A41 | Pillsbury Defense; A41; Rat Defense | 1.d4 d6 |
| A42 | A42 | 1.d4 d6 2.c4 |
| A42 | English Rat | 1.d4 d6 2.c4 e5 |
| A42 | Lisbon Gambit | 1.d4 d6 2.c4 e5 3.dxe5 Nc6 |
| A41 | Wade Defense | 1.d4 d6 2.Nf3 Bg4 |
| A40 | Charlick Gambit; Englund Gambit | 1.d4 e5 |
| A40 | Englund Gambit Declined | 1.d4 e5 2.d5 |
| A40 | Diemer Counterattack | 1.d4 e5 2.d5 Bc5 3.e4 Qh4 |
| A40 | Thuring Gambit; Hartlaub-Charlick Gambit | 1.d4 e5 2.dxe5 d6 |
| A40 | Soller; Purchas Gambit | 1.d4 e5 2.dxe5 f6 |
| A40 | Englund; Behting Gambit | 1.d4 e5 2.dxe5 Nc6 |
| A40 | Felbecker Gambit | 1.d4 e5 2.dxe5 Nc6 3.Nf3 Bc5 |
| A40 | Soller Gambit Deferred | 1.d4 e5 2.dxe5 Nc6 3.Nf3 f6 |
| A40 | Zilbermints Gambit II, Englund Gambit | 1.d4 e5 2.dxe5 Nc6 3.Nf3 h6 |
| A40 | Zilbermints Gambit, Englund Gambit | 1.d4 e5 2.dxe5 Nc6 3.Nf3 Nge7 |
| A40 | Englund Gambit | 1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 |
| A40 | Stockhom Variation, Englund Gambit | 1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 4.Qd5 |
| A40 | Mosquito Gambit, Englund | 1.d4 e5 2.dxe5 Qh4 |
| A40 | Horwitz Defense | 1.d4 e6 |
| A40 | Franco-Indian Defense | 1.d4 e6 |
| A40 | Seneschaud Variation, Dutch | 1.d4 e6 2.Bf4 f5 3.g4 |
| A40 | English Defense | 1.d4 e6 2.c4 b6 |
| A40 | Perrin Variation | 1.d4 e6 2.c4 b6 3.e4 Bb7 4.Bd3 Nc6 |
| A40 | Poli Gambit | 1.d4 e6 2.c4 b6 3.e4 Bb7 4.f3 f5 5.exf5 Nh6 |
| A40 | Hartlaub Gambit Declined | 1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.d5 |
| A40 | Hartlaub Gambit Accepted | 1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.exf5 Nf6 |
| A40 | Keres Defense, Indian; Kangaroo Defense | 1.d4 e6 2.c4 Bb4+ |
| A40 | Transpositional Variation, Keres Defense | 1.d4 e6 2.c4 Bb4+ 3.Nc3 |
| C00 | Franco-Sicilian Defense | 1.d4 e6 2.c4 c5 |
| A43 | Franco-Sicilian Hybrid | 1.d4 e6 2.c4 c5 3.d5 exd5 4.cxd5 d6 5.Nc3 g6 6.e4 Bg7 7.Nf3 Ne7 |
| A40 | Zilbermints Gambit | 1.d4 e6 2.c4 e5 |
| A84 | Bellon Gambit | 1.d4 e6 2.c4 f5 3.e4 |
| A80 | Dutch Defense; A80 | 1.d4 f5 |
| A80 | Seneschaud Gambit, Dutch | 1.d4 f5 2.Bf4 e6 3.g4 |
| A80 | Hopton Attack, Dutch | 1.d4 f5 2.Bg5 |
| A84 | A84 | 1.d4 f5 2.c4 |
| A84 | Classical Variation, Dutch | 1.d4 f5 2.c4 e6 |
| A84 | Bellon Gambit, Dutch | 1.d4 f5 2.c4 e6 3.e4 |
| A84 | Rubinstein Variation, Dutch | 1.d4 f5 2.c4 e6 3.Nc3 |
| A84 | Stonewall Variation, Dutch | 1.d4 f5 2.c4 e6 3.Nc3 Nf6 4.g3 c6 5.Bg2 d5 6.O-O Bd6 |
| A85 | 1.d4 f5 2.c4 g6 3.Nc3 | |
| A85 | Bladel Variation, Dutch | 1.d4 f5 2.c4 g6 3.Nc3 Nh6 |
| A85 | Normal Variation, Dutch | 1.d4 f5 2.c4 Nf6 |
| A86 | Fianchetto Variation, Dutch; A86 | 1.d4 f5 2.c4 Nf6 3.g3 |
| A90 | A90 | 1.d4 f5 2.c4 Nf6 3.g3 e6 |
| A90 | Classical Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 |
| A90 | Nimzo-Dutch Variation | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bb4+ |
| A91 | A91 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 |
| A91 | Botvinnik-Bronstein Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nc3 O-O 6.e3 |
| A92 | A92 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 |
| A93 | Botvinnik Variation, Dutch; A93 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3 |
| A94 | A94 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3 c6 |
| A95 | A95 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.Nc3 |
| A96 | A96 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 |
| A97 | Ilyin-Zhenevsky Variation, Dutch; A97 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 |
| A99 | A99 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.b3 |
| A98 | A98 | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.Qc2 |
| A92 | Alekhine Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O Ne4 |
| A91 | Blackburne Attack, Dutch | 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bg7 5.Nh3 |
| A86 | Leningrad Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.g3 g6 |
| A87 | A87 | 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 |
| A87 | Fluid Formation, Dutch | 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 |
| A88 | Warsaw Variation, Dutch; A88 | 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6 |
| A89 | Matulovic Variation, Dutch; A89 | 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6 |
| A84 | Queen's Knight Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.Nc3 |
| A84 | Krause Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.Nc3 d6 4.Nf3 Nc6 |
| A85 | Ozol Variation, Dutch | 1.d4 f5 2.c4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bg5 |
| A82 | Staunton Gambit, Dutch; A82 | 1.d4 f5 2.e4 |
| A82 | Balogh Defense, Dutch | 1.d4 f5 2.e4 d6 |
| A82 | Staunton Gambit Accepted, Dutch | 1.d4 f5 2.e4 fxe4 |
| A83 | General Variation, Staunton Gambit, Dutch; A83 | 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 |
| A83 | Nimzovich Variation, Dutch | 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 b6 |
| A83 | Chigorin Variation, Dutch | 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 c6 |
| A83 | Lasker Variation, Dutch | 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 g6 5.f3 |
| A80 | Blackmar's Second Gambit, Dutch | 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.f3 |
| A82 | Tartakower Variation, Dutch | 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4 |
| A82 | American Gambit, Dutch | 1.d4 f5 2.e4 fxe4 3.Nd2 |
| A81 | Dutch Indian; Leningrad Variation, Dutch; A81 | 1.d4 f5 2.g3 |
| A81 | Basman Variation, Dutch | 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nf3 c6 5.O-O Nh6 |
| A81 | Carlsbad Variation, Dutch | 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nh3 |
| A81 | Antoshin-Hort Variation, Dutch | 1.d4 f5 2.g3 Nf6 3.Bg2 d6 |
| A81 | Ilyin-Genevsky Variation, Dutch | 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 Be7 5.O-O O-O 6.c4 d6 |
| A81 | Blackburne Variation, Dutch | 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nh3 |
| A81 | Semi-Leningrad Variation, Dutch | 1.d4 f5 2.g3 Nf6 3.Bg2 g6 |
| A80 | Lisbon Gambit, Dutch; Krejcik Gambit | 1.d4 f5 2.g4 |
| A80 | Hevendehl Gambit, Dutch | 1.d4 f5 2.g4 e5 |
| A80 | Tate Gambit, Dutch | 1.d4 f5 2.g4 fxg4 3.e4 d5 4.Nc3 |
| A80 | Korchnoi's Variation, Dutch | 1.d4 f5 2.h3 |
| A80 | Janzen-Korchnoi Gambit, Dutch | 1.d4 f5 2.h3 Nf6 3.g4 |
| A80 | Raphael Variation, Dutch | 1.d4 f5 2.Nc3 |
| A80 | Kingfisher Gambit, Dutch | 1.d4 f5 2.Nc3 d5 3.e4 |
| A80 | Spielmann Gambit, Dutch | 1.d4 f5 2.Nc3 Nf6 3.g4 |
| A80 | Barcza Variation, Dutch | 1.d4 f5 2.Nf3 Nf6 3.c3 |
| A80 | Alapin; Ulvestad; Manhattan; Kmoch Variation, Dutch | 1.d4 f5 2.Qd3 |
| A80 | Anti-Stonewall, Dutch | 1.d4 f5 2.Qd3 d5 3.g4 |
| A80 | Anti-Modern, Dutch | 1.d4 f5 2.Qd3 d6 3.g4 |
| A80 | Anti-Classical Line, Dutch | 1.d4 f5 2.Qd3 e6 3.g4 |
| A80 | Anti-Leningrad Variation, Dutch | 1.d4 f5 2.Qd3 g6 3.g4 |
| A80 | Manhattan Gambit, Dutch | 1.d4 f5 2.Qd3 Nf6 3.g4 |
| A80 | Pretzel Gambit, Dutch | 1.d4 f5 2.Qd3 Nf6 3.g4 |
| A40 | Borg Gambit | 1.d4 g5 |
| A40 | Queen Pawn Fianchetto | 1.d4 g6 |
| A40 | Kotov-Robatsch Defense | 1.d4 g6 2.c4 Bg7 |
| A40 | Pseudo-Saemisch | 1.d4 g6 2.c4 Bg7 3.e4 d6 4.Be3 Nf6 5.f3 |
| A40 | Rossolimo Variation | 1.d4 g6 2.c4 Bg7 3.e4 d6 4.Nf3 Bg4 |
| A40 | Neo-Modern Defense | 1.d4 g6 2.c4 Bg7 3.e4 e5 |
| A40 | Beefeater Variation | 1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 Bxc3+ 5.bxc3 f5 |
| A40 | Modern Defense | 1.d4 g6 2.c4 Bg7 3.Nc3 d6 |
| A41 | Averbakh Variation, Modern | 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 |
| A41 | Pterodactyl Variation, Modern | 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 c5 5.Nf3 Qa5 |
| A42 | Randspringer Variation | 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 f5 |
| A40 | Kotov Variation, Modern | 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nc6 |
| A40 | Lizard Defense; Pirc-Diemer Gambit | 1.d4 g6 2.h4 Nf6 3.h5 |
| A40 | Bogoljubov; Mikenas-Van Geet Defense | 1.d4 Nc6 |
| A40 | Lundin Defense | 1.d4 Nc6 |
| A40 | Lithuanian Variation, Mikenas | 1.d4 Nc6 2.c4 e5 3.d5 Nce7 |
| A40 | Cannstatter Variation, Mikenas | 1.d4 Nc6 2.c4 e5 3.d5 Nd4 |
| A40 | Pozarek Gambit | 1.d4 Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4 |
| A40 | Montevideo Defense | 1.d4 Nc6 2.d5 Nb8 |
| A40 | Zaire Defense | 1.d4 Nc6 2.d5 Nb8 3.e4 Nf6 5.e5 Ng8 |
| A45 | Indian Defense; A45 | 1.d4 Nf6 |
| A45 | Basque Opening | 1.d4 Nf6 2.b3 |
| A45 | Trompowsky; Opocensky; Ruth Opening | 1.d4 Nf6 2.Bg5 |
| A45 | Poisoned Pawn Variation, Trompowsky | 1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3 |
| A45 | Chepukaitis Gambit | 1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3 Qxb2 5.Bd2 Qb6 |
| A45 | Borg Variation, Trompowsky | 1.d4 Nf6 2.Bg5 Ne4 3.Bf4 g5 |
| A45 | Edge Variation, Trompowsky | 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 |
| A45 | Hergert Gambit #2, Trompowsky | 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 c6 4.Nd2 Qa5 5.c3 Nxd2 6.Qxd2 d5 7.e4 |
| A45 | Hergert Gambit #1, Trompowsky | 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 d5 4.f3 Nf6 5.Nc3 Bf5 6.e4 |
| A45 | Raptor Variation, Trompowsky | 1.d4 Nf6 2.Bg5 Ne4 3.h4 |
| A45 | Hergert Gambit, Trompowsky | 1.d4 Nf6 2.Bg5 Ne4 3.h4 Nxg5 4.hxg5 e5 |
| A50 | Normal Variation, Indian Game; A50 | 1.d4 Nf6 2.c4 |
| A50 | Pyrenees Gambit | 1.d4 Nf6 2.c4 b5 |
| A50 | Queen's Indian Defense; Saemisch-Indian | 1.d4 Nf6 2.c4 b6 |
| A56 | Hromadka Defense; Loose Gambit: A56 | 1.d4 Nf6 2.c4 c5 |
| A57 | Benko Gambit; Volga; Opocensky; Vaitonis; A57 | 1.d4 Nf6 2.c4 c5 3.d5 b5 |
| A57 | Sosonko Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.a4 |
| A57 | Bishop Attack, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Bg5 |
| A57 | Benko Gambit Accepted | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 |
| A57 | Pawn Return Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6 |
| A58 | Fully Accepted Variation, Benko Gambit; A58 | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 |
| A59 | A59 | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 |
| A59 | King Walk Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O |
| A57 | Central Storming Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.f4 |
| A58 | Fianchetto Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 g6 7.Nf3 d6 8.g3 Bg7 9.Bg2 |
| A57 | Modern Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3 |
| A57 | Dlugy Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.f3 |
| A57 | Zaitsev System, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 |
| A57 | Nescafe Frappe Attack, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 |
| A57 | Zaitsev Variation, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Nf3 g6 9.Bc4 |
| A57 | Benko Gambit Declined; Hjoerring Countergambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.e4 |
| A57 | Pseudo-Saemisch, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.f3 |
| A57 | Mutkin Countergambit, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.g4 |
| A57 | Quiet Line, Benko Gambit | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nd2 |
| A57 | Main Line, Benko Gambit Declined | 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3 |
| A56 | Hromadka System, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 d6 |
| A56 | Lundin; Bronstein Counter-Gambit | 1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 b5 |
| A56 | Petrosian System; Czech Benoni Defense | 1.d4 Nf6 2.c4 c5 3.d5 e5 |
| A56 | Czech Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 |
| A56 | King's Indian System, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 g6 |
| A60 | Tal Variation, Modern Variation, Benoni; A60 | 1.d4 Nf6 2.c4 c5 3.d5 e6 |
| A61 | A61 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 |
| A61 | Snake Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 Bd6 |
| A60 | Modern Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 |
| A65 | King Pawn lines, Benoni; A65 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 |
| A66 | Pawn Storm Variation, Benoni; A66 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 |
| A67 | Taimanov Variation, Benoni; A67 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5 |
| A66 | Mikenas V, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5 |
| A68 | A68 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 |
| A68 | Four Pawns Attack, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O |
| A69 | A69 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Be2 Re8 |
| A70 | Classical Variation, Benoni; A70 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 |
| A72 | A72 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 |
| A73 | A73 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O |
| A74 | A74 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 |
| A75 | Argentine Attack, Benoni; A75 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 10.a4 Bg4 |
| A76 | Czerniak Defesne, Benoni; A76 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 |
| A77 | A77 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 |
| A78 | A78 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 |
| A79 | A79 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 11.f3 |
| A71 | A71 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Bg5 |
| A61 | Penrose Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bd3 |
| A61 | Uhlmann Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bg5 |
| A62 | A62 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 |
| A62 | Fianchetto Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 |
| A63 | A63 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O a6 |
| A64 | A64 | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O a6 10.a4 Nbd7 11.Nd2 |
| A62 | Hastings Defense, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O Nbd7 |
| A61 | Nimzovich Variation, Knight's Tour Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2 |
| A56 | Vulture Variation; Der Geier | 1.d4 Nf6 2.c4 c5 3.d5 Ne4 |
| A56 | Weenink Variation, Benoni | 1.d4 Nf6 2.c4 c5 3.dxc5 e6 |
| A53 | Old Indian Defense; Chigorin Indian Defense; A53 | 1.d4 Nf6 2.c4 d6 |
| A53 | Aged Gibbon Gambit | 1.d4 Nf6 2.c4 d6 3.g4 |
| A53 | Janowski Variation, Old Indian | 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 |
| A53 | Grinberg Gambit, Old Indian | 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.e4 |
| A53 | Ukranian Variation | 1.d4 Nf6 2.c4 d6 3.Nc3 e5 |
| A54 | Two Knights Variation, Old Indian; A54 | 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 |
| A55 | Normal Variation, Old Indian; A55 | 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4 |
| A53 | Duz-Khotimirsky Variation | 1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e3 e5 5.Bd3 |
| A53 | Tartakower-Indian | 1.d4 Nf6 2.c4 d6 3.Nf3 Bg4 |
| A51 | Budapest Defense; A51 | 1.d4 Nf6 2.c4 e5 |
| A51 | Fajarowicz Variation, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 |
| A51 | Bonsdorf Variation, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.a3 b6 |
| A51 | Steiner Variation, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.Qc2 |
| A52 | Normal Variation, Budapest; A52 | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 |
| A52 | Rubinstein Variation, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 |
| A52 | Kornl Richter Gambit, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nc3 Bxc3+ |
| A52 | Center Play Variation, Budapest; Alekhine Variation | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 |
| A52 | Balogh; Tartakower C-G, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 d6 |
| A52 | Barmina Gambit, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Bc5 |
| A52 | Wikstrom Gambit, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nbc6 |
| A52 | Abonyi Variation, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nec6 |
| A52 | Adler Variation, Budapest | 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3 |
| E00 | East Indian Defense; E00 | 1.d4 Nf6 2.c4 e6 |
| E00 | Seirawan Attack | 1.d4 Nf6 2.c4 e6 3.Bg5 |
| E00 | Catalan Opening | 1.d4 Nf6 2.c4 e6 3.g3 |
| E01 | E01 | 1.d4 Nf6 2.c4 e6 3.g3 d5 |
| E06 | Closed Variation, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 |
| E06 | E06 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 |
| E07 | E07 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 |
| E07 | Botvinnik Variation, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Nc3 c6 8.Qd3 |
| E08 | E08 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 |
| E09 | E09 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 |
| E09 | Sokolsky Variation, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 b6 8.Nbd2 b6 9.b3 a5 10.Bb2 Ba6 |
| E08 | Zagoriansky Variation, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Rd1 b6 9.a4 |
| E06 | Tarrasch Defense, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c5 5.Nf3 Nc6 |
| E02 | E02 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 |
| E04 | Open Defense, Catalan; E04 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 |
| E05 | Classical Line, Catalan; E05 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Be7 |
| E05 | Modern Sharp Variation, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+ |
| E03 | E03 | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 |
| E03 | Alekhine Variation, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 a6 7.Qc2 |
| E00 | Hungarian Gambit, Catalan | 1.d4 Nf6 2.c4 e6 3.g3 e5 |
| E00 | Devin Gambit, Catalan | 1.d4 Nf6 2.c4 e6 3.g4 |
| E20 | E20 | 1.d4 Nf6 2.c4 e6 3.Nc3 |
| E20 | Nimzo-Indian Defense | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 |
| E24 | Saemisch Variation, Nimzo-Indian; E24 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 |
| E24 | Accelerated Saemisch Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 |
| E26 | Saemisch Variation, Nimzo-Indian; E26 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 |
| E26 | O'Kelly Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 b6 |
| E26 | Capablanca Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 Nc6 7.Bd3 O-O 8.Ne2 b6 9.e4 Ne8 |
| E25 | E25 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 |
| E25 | Keres Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5 |
| E25 | Romanovsky Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5 f5 |
| E24 | Botvinnik Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.e3 O-O 8.cxd5 Nxd5 |
| E27 | E27 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O |
| E28 | E28 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O 6.e3 |
| E29 | E29 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O 6.e3 c5 7.Bd3 Nc6 |
| E29 | Capablanca Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O 6.e3 c5 7.Bd3 Nc6 8.Ne2 b6 9.e4 Ne8 |
| E30 | Leningrad Variation, Nimzo-Indian; E30 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 |
| E30 | Averbakh Gambit, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 b5 |
| E31 | Benoni Defense, Nimzo-Indian; E31 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 d6 |
| E40 | Rubinstein Variation, Nimzo-Indian; E40 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 |
| E43 | St. Petersburg Variation, Nimzo-Indian; E43 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 |
| E44 | Fischer Variation, Nimzo-Indian; E44 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 |
| E45 | Bronstein Variation, Nimzo-Indian; E45; Byrne Variation | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6 |
| E41 | Huebner Variation, Nimzo-Indian; E41 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 |
| E41 | Huebner Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3 |
| E42 | Rubinstein Variation, Nimzo-Indian; E42 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 |
| E42 | Sherbakov Attack, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.c5 |
| E41 | Panov Attack, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nf3 cxd4 6.exd4 d5 |
| E40 | Keres Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 exd5 8.Bd3 O-O 9.Ne2 b6 |
| E40 | Taimanov Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6 |
| E40 | Ragozin Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6 5.Nf3 O-O 6.Bd3 d5 7.O-O dxc4 |
| E46 | Normal Variation, Nimzo-Indian; E46 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O |
| E47 | Bishop Attack, Nimzo-Indian; E47 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 |
| E48 | Classical Defense, Nimzo-Indian; E48 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 |
| E49 | Botvinnik System, Nimzo-Indian; E49 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3 |
| E48 | Olafsson Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 b6 9.Qe2 Bb7 10.Rd1 Qc8 |
| E48 | Bronstein Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Bd7 |
| E48 | Bronstein Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Nbd7 9.Ne2 |
| E48 | Smyslov Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Qe7 |
| E46 | Reshevsky Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 |
| E46 | Simagin Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6 |
| E50 | E50 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 |
| E50 | Huebner Deferred, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 c5 |
| E51 | Ragozin Variation, Nimzo-Indian; E51 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 |
| E51 | Saemisch Deferred, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.a3 |
| E52 | Schlechter Defense, Nimzo-Indian; E52 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6 |
| E53 | Bernstein Defense; Gligoric System; E53 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 |
| E53 | Keres Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O b6 |
| E54 | E54 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 |
| E55 | Bronstein Variation, Nimzo-Indian; E55 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Nbd7 |
| E55 | Smyslov Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Qe7 |
| E56 | Bernstein Variation, Nimzo-Indian; E56 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 |
| E58 | E58 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 Bxc3 9.bxc3 |
| E59 | E59 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 Bxc3 9.bxc3 dxc4 10.Bxc4 |
| E57 | E57 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 dxc4 9.Bxc4 cxd4 |
| E46 | Reshevsky Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2 |
| E46 | Simagin Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2 d5 6.a3 Bd6 |
| E20 | Kmoch Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3 |
| E20 | Steiner Variation, Nimzo-Indian; Romanishin Variation | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3 |
| E21 | Three Knights Variation, Nimzo-Indian; E21 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 |
| E21 | Korchnoi Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 |
| E21 | Shocron Gambit, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 b5 |
| E21 | Euwe Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 Ne4 |
| E20 | Romanishin Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2 |
| E20 | English Hybrid, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2 cxd4 7.Nxd4 d5 8.cxd5 Nxd5 |
| E20 | Ragozin Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 d5 |
| E22 | Spielmann Variation, Nimzo-Indian; E22 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 |
| E23 | Romanovsky Gambit, Nimzo-Indian; E23 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 |
| E23 | San Remo Variation, Nimzo-Indian; Stahlberg Variation | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5 |
| E23 | Stahlberg Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5 8.Qc2 f5 9.g3 |
| E23 | Carlsbad Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2 |
| E23 | Stahlberg Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2 8.Nxd2 O-O 9.O-O-O |
| E32 | Classical Variation, Nimzo-Indian; E32 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 |
| E38 | Berlin Variation, Nimzo-Indian; E38 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 |
| E38 | Steiner Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Bxc3+ |
| E39 | Pirc Variation, Nimzo-Indian; E39 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O |
| E34 | Noa Variation, Nimzo-Indian; E34 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 |
| E36 | E36 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 |
| E36 | Botvinnik Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Nc6 |
| E37 | E37 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 |
| E37 | San Remo Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 Nc6 8.e3 e5 |
| E35 | E35 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 |
| E35 | Romanishin Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5 |
| E35 | Beliavsky Gambit, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5 7.Qd1 e5 |
| E33 | Milner-Barry, Zurich Variation, Nimzo-Indian; E33 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 |
| E33 | Milner-Barry Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6 |
| E33 | Old Zurich Variation, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6 6.a3 |
| E33 | Vitolinsh-Adorjan Gambit, Nimzo Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b5 |
| E33 | Keres Defense, Nimzo-Indian | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6 |
| E10 | Anti-Nimzo-Indian; E10 | 1.d4 Nf6 2.c4 e6 3.Nf3 |
| E10 | Dzindzi-Indian Defense | 1.d4 Nf6 2.c4 e6 3.Nf3 a6 |
| E12 | Queen's Indian Defense; E12 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 |
| E12 | Petrosian Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 |
| E12 | Farago Defense, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7 |
| E12 | Murey Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 c5 8.e4 Nxc3 9.bxc3 Nc6 10.Bb2 cxd4 11.cxd4 Rc8 12.Rd1 Bd6 |
| E12 | Miles Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Bf4 |
| E14 | Spassky System, QID; E14 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 |
| E14 | Averbakh Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 c5 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.Nxd4 |
| E15 | Fianchetto System, QID; E15 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 |
| E15 | Nimzovich Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 |
| E15 | Quiet Line, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3 |
| E15 | Nimzovich Attack, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qa4+ |
| E15 | Timman's Line, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qb3 |
| E16 | Fianchetto Traditional, QID; E16 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 |
| E16 | Capablanca Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ |
| E16 | Yates Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 a5 |
| E16 | Riumin Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7 |
| E17 | Traditional Variation, QID; E17 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 |
| E17 | Anti-Queen's Indian System | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3 |
| E17 | Opocensky Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3 Ne4 7.Bd2 |
| E17 | Classical Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O |
| E17 | Euwe Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.b3 |
| E17 | Taimanov Gambit, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nd4 |
| E17 | Polugaevsky Gambit, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nh4 |
| E18 | E18 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 |
| E18 | Tiviakov Defense, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Na6 |
| E19 | E19 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 |
| E17 | Kramnik Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Re1 |
| E15 | Saemisch Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 |
| E16 | Buerger Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Ng5 |
| E16 | Rubinstein Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Nh4 |
| E16 | Fine Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Qc8 6.O-O c5 7.d5 |
| E12 | Kasparov Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 |
| E12 | Kasparov-Petrosian Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 |
| E12 | Polovodin Gambit, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e4 |
| E12 | Hedgehog Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 g6 |
| E13 | E13 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 Bb4 |
| E12 | Botvinnik Variation, QID | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5 |
| E11 | Bogoljubow Defense; Bogo-Indian Defense; E11 | 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ |
| E11 | Monticelli Trap | 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Bxd2+ 5.Qxd2 b6 6.g3 Bb7 7.Bg2 O-O 8.Nc3 Ne4 9.Qc2 Nxc3 10.Bg5 |
| E11 | Nimzovich Variation, Bogo-Indian | 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7 |
| E11 | Grunfeld Variation, Bogo-Indian | 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2 |
| E10 | Blumenfeld Variation | 1.d4 Nf6 2.c4 e6 3.Nf3 c5 |
| E10 | Blumenfeld Countergambit | 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 |
| E10 | Dus-Chotimursky Variation | 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5 |
| E10 | Spielmann Variation, Blumenfeld | 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5 exd5 6.cxd5 h6 |
| E10 | Blumenfeld Countergambit Accepted | 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.dxe6 fxe6 6.cxb5 d5 |
| E10 | Rubinstein Variation, Blumenfeld | 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.e4 |
| E10 | Dory (Doery) Defense | 1.d4 Nf6 2.c4 e6 3.Nf3 Ne4 |
| A50 | Medusa Gambit | 1.d4 Nf6 2.c4 g5 |
| D70 | King's Indian Defense; West Indian Defense; D70 | 1.d4 Nf6 2.c4 g6 |
| E60 | King's Indian Defense; West Indian Defense; E60 | 1.d4 Nf6 2.c4 g6 |
| D70 | Anti-Grunfeld Variation | 1.d4 Nf6 2.c4 g6 3.d5 |
| D70 | Danube Gambit; Adorjan Gambit | 1.d4 Nf6 2.c4 g6 3.d5 b5 |
| D70 | Danube; Donau Gambit | 1.d4 Nf6 2.c4 g6 3.d5 b5 4.cxb5 a6 5.bxa6 c6 |
| D70 | Nimzovich Attack; Anti-Grunfeld; Alekhine Variation | 1.d4 Nf6 2.c4 g6 3.f3 |
| D70 | Goglidze Attack | 1.d4 Nf6 2.c4 g6 3.f3 d5 |
| D70 | Leko Gambit | 1.d4 Nf6 2.c4 g6 3.f3 e5 |
| E60 | Fianchetto Variation, KID | 1.d4 Nf6 2.c4 g6 3.g3 |
| E60 | Counterthrust Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 |
| E60 | Kemeri Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O c5 |
| E60 | Yugoslav Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c5 |
| E60 | Bronstein Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c6 7.O-O Qa5 |
| E60 | Panno Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O a6 8.h3 Rb8 |
| E60 | Spassky Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bf5 |
| E60 | Simagin Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bg4 |
| E60 | Szabo Variation | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O e5 |
| E60 | Panno System | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nc6 7.d5 Na5 |
| E60 | Pomar Variation, KID | 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nge2 |
| D70 | Kemeri; Neo-Grunfeld | 1.d4 Nf6 2.c4 g6 3.g3 d5 |
| D71 | Counterthrust Variation | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 |
| D71 | Exchange Variation, Neo-Grunfeld | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5 |
| D72 | D72 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5 6.e4 Nb6 |
| D73 | D73 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 |
| D74 | Delayed Exchange Variation, Neo-Grunfeld; D74 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-O |
| D75 | D75 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-O c5 |
| D76 | D76 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-O Nb6 |
| D77 | Classical Variation, Neo-Grunfeld; D77 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O |
| D78 | Original Defesne, Neo-Grunfeld; D78 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 |
| D79 | D79 | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.cxd5 |
| D79 | Ultra-delayed Exchange Variation, Neo-Grunfeld | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.cxd5 cxd5 |
| D78 | Modern Defense, Neo-Grunfeld | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O dxc4 |
| D78 | Polgar Variation, Neo-Grunfeld | 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O Nc6 |
| E61 | E61 | 1.d4 Nf6 2.c4 g6 3.Nc3 |
| E61 | Smyslov Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Bg5 |
| E70 | Normal Variation, KID; E70 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 |
| E77 | Six Pawns Attack, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 |
| E73 | E73 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 |
| E73 | Semi-Averbakh System, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Be3 |
| E73 | Averbakh Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 |
| E73 | Spanish Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 a6 |
| E74 | Benoni Defense, KID; E74 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 |
| E75 | E75 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5 c6 |
| E73 | Flexible Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6 |
| E73 | Burgess Line, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Na6 7.Qd2 c6 |
| E73 | Geller Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7 |
| E70 | Accelerated Averbakh Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Bg5 |
| E80 | Saemisch Variation, KID; E80 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 |
| E80 | Bronstein Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 e5 6.d5 Nh5 7.Be3 Na6 8.Qd2 Qh4+ 9.g3 Nxg3 10.Qf2 Nxf1 11.Qxh4 Nxe3 12.Kf2 Nxc4 |
| E81 | Normal Defesne, Sameisch Variation, KID; E81 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O |
| E82 | Double Fianchetto, KID; E82 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6 |
| E81 | Byrne Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c6 7.Bd3 a6 |
| E85 | Orthodox Variation, KID; E85 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 |
| E87 | Closed Variation, KID; E87 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 |
| E88 | E88 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 c6 |
| E89 | E89 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 c6 8.Nge2 |
| E87 | Bronstein Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 Nh5 8.Qd2 Qh4+ 9.g3 Nxg3 10.Qf2 Nxf1 |
| E86 | E86 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.Nge2 c6 |
| E83 | Yates Defense, KID; E83 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 |
| E83 | Panno Formation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6 |
| E84 | E84 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6 8.Qd2 Rb8 |
| E83 | Ruban Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 Rb8 |
| E81 | Steiner Attack, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5 |
| E81 | Bobotsov-Korchnoi-Petrosian Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Nge2 |
| E76 | Four Pawns Attack, KID; E76 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 |
| E76 | Six Pawns Attack, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 c5 6.d5 O-O 7.Be2 e6 8.dxe6 fxe6 9.g4 Nc6 10.h4 |
| E76 | Modern Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 Na6 |
| E77 | E77 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 |
| E77 | Florentine Gambit, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.d5 e6 8.Nf3 exd5 9.e5 |
| E78 | Fluid Attack, KID; E78 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.Nf3 |
| E79 | Exchange Variation, Four Pawns Attack, KID; E79 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.Nf3 cxd4 8.Nxd4 Nc6 9.Be3 |
| E76 | Dynamic Attack, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Nf3 c5 7.d5 |
| E72 | Deferred Fianchetto, KID; E72 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 |
| E72 | Pomar System, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 O-O 6.Bg2 e5 7.Nge2 |
| E71 | Makogonov Variation, KID; E71 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3 |
| E90 | E90 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 |
| E91 | Orthodox Variation, KID; E91 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 |
| E92 | E92 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 |
| E92 | Gligoric-Taimanov Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.Be3 |
| E92 | Petrosian Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 |
| E92 | Stein Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 a5 |
| E93 | E93 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 Nbd7 |
| E93 | Keres Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 Nbd7 8.Bg5 h6 9.Bh4 g5 10.Bg3 Nh5 11.h4 |
| E94 | E94 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O |
| E94 | Ukranian Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O a5 |
| E94 | Donner Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O c6 |
| E94 | Glek Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Na6 |
| E95 | E95 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nbd7 8.Re1 |
| E96 | E96 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nbd7 8.Re1 c6 9.Bf1 a5 |
| E97 | Aronin-Taimanov Variation, KID; E97 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 |
| E97 | Normal Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 |
| E97 | Bayonet Attack, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 |
| E97 | Yepishin's Line, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 Nh5 10.Qc2 |
| E97 | Sokolov's Line, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 Nh5 10.Re1 |
| E97 | Korchnoi Attack, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Bd2 |
| E98 | E98 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 |
| E98 | Kozul Gambit, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5 |
| E99 | Benko Attack, KID; E99 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.f3 |
| E99 | Benko Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.f3 f5 11.g4 |
| E90 | Larsen Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be3 |
| E90 | Zinnowitz Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Bg5 |
| E91 | Kazakh Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Na6 |
| E61 | Smyslov Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Bg5 |
| E62 | Delayed Fianchetto, KID; E62 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 |
| E64 | Yugoslav Variation, KID; E64 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 |
| E65 | E65 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 7.O-O |
| E66 | E66 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 7.O-O Nc6 8.d5 |
| E62 | Larsen Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Bf5 |
| E62 | Kavalek Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qa5 |
| E62 | Benjamin Defense, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qb6 |
| E67 | Debrecen Defense, KID; E67 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7 |
| E68 | E68 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7 7.O-O e5 8.e4 |
| E69 | E69 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7 7.O-O e5 8.e4 c6 9.h3 |
| E62 | Carlsbad Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 |
| E63 | Panno Variation, KID; E63 | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O a6 |
| E62 | Lesser Simagin (Spassky) Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bf5 |
| E62 | Simagin Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bg4 |
| E62 | Uhlmann-Szabo System, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O e5 |
| E70 | Kramer Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Nge2 |
| D80 | Grunfeld Defense; D80 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 |
| D82 | Brinckmann Attack, Grunfeld; D82 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 |
| D83 | Grunfeld Gambit; D83 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O |
| D84 | D84 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.cxd5 Nxd5 |
| D83 | Capablanca Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 |
| D83 | Botvinnik Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Be6 |
| D83 | Reshevsky Gambit, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Qa5 |
| D80 | Stockholm Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 |
| D80 | Lundin Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxc3 6.Qd2 c5 |
| D85 | Exchange Variation, Grunfeld; D85 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 |
| D85 | Exchange Variation, Grunfeld; | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 |
| D86 | Classical Main Line, Grunfeld; D86 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 |
| D86 | Simagin Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 b6 9.h4 Ba6 |
| D87 | Spassky Variation, Grunfeld; D87 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 |
| D87 | Seville Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 |
| D88 | D88 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4 |
| D89 | D89 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4 11.cxd4 Bg4 12.f3 Na5 13.Bd3 |
| D89 | Sokolsky Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4 11.cxd4 Bg4 12.f3 Na5 13.Bd3 Be6 14.d5 |
| D86 | Simagin Improved Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Nc6 |
| D86 | Larsen Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Qd7 |
| D86 | Larsen Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Qd7 9.O-O b6 |
| D85 | Modern Main Line, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 |
| D85 | Kramnik's Line, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.h3 |
| D85 | Kemeri Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 |
| D85 | Nadanian Attack | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4 |
| D80 | Makogonov Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.b4 |
| D80 | Opocensky Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd2 |
| D80 | Paris Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 |
| D80 | Schlechter Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 |
| D80 | Flohr Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bf5 |
| D80 | Smyslov Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bg4 |
| D80 | Vienna Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 |
| D80 | Pachman Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 dxc4 7.Bxc4 Nbd7 8.Ng5 |
| D80 | Botvinnik Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 e6 |
| D80 | Schlechter Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 c6 |
| D70 | Lutikov Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 |
| D70 | Murey Attack, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 c5 5.cxd5 Nxd5 6.Na4 |
| D80 | Kemeri Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g3 |
| D80 | Gibbon Gambit; Grunfeld Spike | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g4 |
| D80 | Zaitsev Gambit, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4 |
| D90 | Three Knights Variation, Grunfeld; D90 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 |
| D92 | Hungarian Attack, Grunfeld; D92 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 |
| D93 | D93 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O-O 6.e3 |
| D91 | Petrosian System, Grunfeld; D91 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 |
| D94 | Burille Variation, Grunfeld; D94 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 |
| D94 | Makogonov Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.b4 |
| D94 | Opocensky Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2 |
| D95 | D95 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Qb3 |
| D90 | Flohr Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qa4+ |
| D96 | Russian Variation, Grunfeld; D96 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 |
| D97 | D97 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 |
| D97 | Hungarian Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 a6 |
| D97 | Levenfish Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 b6 |
| D98 | Smyslov Variation, Grunfeld; D98 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 |
| D98 | Keres Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be2 Nfd7 9.Be2 Nb6 10.Qd3 Nc6 11.O-O-O Qc8 |
| D99 | D99 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3 |
| D99 | Yugoslav Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3 c5 |
| D97 | Szabo (Boleslavsky) Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 c6 |
| D97 | Prins Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6 |
| D97 | Simagin (Byrne) Variation, Grunfeld | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Nc6 |
| D90 | Slav Fianchetto | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Nf6 5.Nc3 g6 |
| D81 | Accelerated Russian Variation, Grunfeld; D81 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3 |
| E60 | King's Knight Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nf3 |
| E60 | Santassiere Variation, KID | 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.b4 |
| D70 | Neo-Grunfeld Defense | 1.d4 Nf6 2.c4 g6 3.Nf3 d5 |
| A50 | Van Geet; Kevitz; Trajkovic; Mexican | 1.d4 Nf6 2.c4 Nc6 |
| D70 | Iago Defense | 1.d4 Nf6 2.c4 Nc6 |
| A50 | Horsefly Gambit | 1.d4 Nf6 2.c4 Nc6 3.d5 Ne5 4.f4 |
| D71 | D71 | 1.d4 Nf6 2.c4 Nc6 3.g3 d5 |
| A45 | Pawn Push Variation | 1.d4 Nf6 2.d5 |
| A45 | Omega Gambit | 1.d4 Nf6 2.e4 |
| A45 | Arafat Gambit | 1.d4 Nf6 2.e4 Nxe4 3.Bd3 Nf6 4.Bg5 |
| A45 | Paleface Attack | 1.d4 Nf6 2.f3 |
| A45 | Webster Gambit | 1.d4 Nf6 2.f3 c5 3.d5 e6 4.e4 exd5 5.e5 |
| A45 | Blackmar-Diemer Gambit Deferred | 1.d4 Nf6 2.f3 d5 3.e4 |
| A45 | Kraus-Muhlherr Counter Gambit | 1.d4 Nf6 2.f3 d5 3.e4 e5 4.dxe5 Nxe4 |
| A45 | Gedult Attack | 1.d4 Nf6 2.f3 d5 3.g4 |
| A45 | Gedult-Gunderam System | 1.d4 Nf6 2.f3 d5 3.g4 |
| A45 | Linder Counter Gambit | 1.d4 Nf6 2.f3 e6 3.e4 Nxe4 |
| A45 | Canard Attack | 1.d4 Nf6 2.f4 |
| A45 | Ueberlinger Gambit | 1.d4 Nf6 2.g3 e5 |
| A45 | Bullfrog; Weidenhagen; Krabbe; Ochsenfrosch | 1.d4 Nf6 2.g4 |
| A45 | Bronstein Gambit | 1.d4 Nf6 2.g4 |
| A45 | Oshima Defense | 1.d4 Nf6 2.g4 e5 |
| A45 | Gibbins-Wiedehagen Gambit Accepted | 1.d4 Nf6 2.g4 Nxg4 |
| A45 | Stummer Gambit | 1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3 |
| A45 | Maltese Falcon | 1.d4 Nf6 2.g4 Nxg4 3.f3 Nf6 4.e4 |
| A45 | Reversed Chigorin Defense | 1.d4 Nf6 2.Nc3 c5 |
| A45 | Von Beivorseen | 1.d4 Nf6 2.Nc3 c5 3.dxc5 |
| A45 | Malich Gambit | 1.d4 Nf6 2.Nc3 d5 3.Bg5 c5 4.Bxf6 gxf6 5.e4 dxe4 6.d5 |
| A45 | Huebsch Gambit | 1.d4 Nf6 2.Nc3 d5 3.e4 Nxe4 |
| A45 | Maddigan Gambit | 1.d4 Nf6 2.Nc3 e5 |
| A45 | Lazard Gambit; Maddigan Gambit | 1.d4 Nf6 2.Nd2 e5 |
| A46 | Knights Variation, Indian Game; A46 | 1.d4 Nf6 2.Nf3 |
| A46 | Polish Defense | 1.d4 Nf6 2.Nf3 b5 |
| A47 | Capablanca Variation, Indian Game; A47 | 1.d4 Nf6 2.Nf3 b6 |
| A47 | Torre Attack | 1.d4 Nf6 2.Nf3 b6 3.Bg5 |
| A47 | Schnepper Gambit | 1.d4 Nf6 2.Nf3 b6 3.c3 e5 |
| A47 | Marienbad Variation | 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5 |
| A47 | Berg Variation | 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5 5.c4 cxd4 6.Qxd4 |
| A46 | Spielmann-Indian | 1.d4 Nf6 2.Nf3 c5 |
| A46 | Pseudo-Benko Gambit | 1.d4 Nf6 2.Nf3 c5 3.d5 b5 |
| A46 | Czech-Indian | 1.d4 Nf6 2.Nf3 c6 |
| A46 | London System | 1.d4 Nf6 2.Nf3 e6 3.Bf4 |
| A46 | Torre Attack | 1.d4 Nf6 2.Nf3 e6 3.Bg5 |
| A46 | Petrosian Gambit | 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5 |
| A46 | Swiss; Wagner Gambit | 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e4 |
| A46 | Nimzovich Variation, Torre Attack | 1.d4 Nf6 2.Nf3 e6 3.Bg5 h6 |
| A46 | Yusupov-Rubinstein System | 1.d4 Nf6 2.Nf3 e6 3.e3 |
| A48 | Pseudo-King's Indian Variation; A48 | 1.d4 Nf6 2.Nf3 g6 |
| A48 | London System, Torre Attack | 1.d4 Nf6 2.Nf3 g6 3.Bf4 |
| A48 | London Variation | 1.d4 Nf6 2.Nf3 g6 3.Bf4 Bg7 4.Nbd2 |
| A48 | Fianchetto Defense, Torre Attack | 1.d4 Nf6 2.Nf3 g6 3.Bg5 |
| A48 | Euwe Variation, Torre Attack | 1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.Nbd2 c5 |
| A48 | King's Indian Variation | 1.d4 Nf6 2.Nf3 g6 3.e3 Bg7 4.Bd3 d6 |
| A49 | Przepiorka Variation; A49 | 1.d4 Nf6 2.Nf3 g6 3.g3 |
| D02 | Barry Attack | 1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Be2 |
| A46 | Dory Defense | 1.d4 Nf6 2.Nf3 Ne4 |
| A00 | Keoni-Hiva Gambit | 1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3 |
| A00 | Van't Kruijs Opening | 1.e3 e5 |
| A00 | Bouncing Bishop Variation | 1.e3 e5 2.Bc4 b5 3.Bb3 |
| A00 | Amsterdam Attack | 1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6 |
| A00 | Ekolu Variation | 1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3 |
| A00 | Alua Variation | 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 |
| A00 | Akahi Variation | 1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3 |
| B00 | Ware Defense | 1.e4 a5 |
| B00 | Corn Stalks | 1.e4 a5 |
| B00 | Snagkeouss Defense | 1.e4 a5 2.d4 Nc6 |
| B00 | St George; Birmingham; Baker | 1.e4 a6 |
| B00 | San Jorge Variation | 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 d6 5.O-O g6 6.c3 Bg7 |
| B00 | Polish Variation, St George Defense | 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 e6 |
| B00 | Zilbermints Gambit, St George Defense | 1.e4 a6 2.d4 e5 |
| B00 | San Jorge Variation | 1.e4 a6 2.d4 e6 |
| B00 | Three Pawn Attack, St George | 1.e4 a6 2.d4 e6 3.c4 |
| B00 | Sanky-Georg Gambit, St George | 1.e4 a6 2.d4 e6 3.c4 b5 |
| B00 | Woodchuck Variation, St George | 1.e4 a6 2.d4 Nc6 |
| B00 | Owen's Defense; Greek Defense | 1.e4 b6 |
| B00 | Guatemalan Defense | 1.e4 b6 2.d4 Ba6 |
| B00 | Matovinsky Gambit | 1.e4 b6 2.d4 Bb7 3.Bd3 f5 |
| B00 | Matovinsky Gambit | 1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6 |
| B00 | Naselwaus Variation, Owen's Defense | 1.e4 b6 2.d4 Bb7 3.Bg5 |
| B00 | Wind Gambit, Owen Defense | 1.e4 b6 2.d4 Bb7 3.f3 e5 |
| B00 | Smith Gambit, Owen Defense | 1.e4 b6 2.d4 Bb7 3.Nf3 |
| B00 | Hekili-Loa Gambit, Owen Defense | 1.e4 b6 2.d4 c5 3.dxc5 Nc6 |
| B20 | Sicilian Defense; B20 | 1.e4 c5 |
| B20 | Mengarini Gambit, Sicilian | 1.e4 c5 2.a3 |
| B20 | Mengarini Gambit, Sicilian | 1.e4 c5 2.a3 Nc6 3.b4 |
| B20 | Snyder Variation, Sicilian | 1.e4 c5 2.b3 |
| B20 | Queen Fianchetto Variation, Sicilian | 1.e4 c5 2.b3 b6 |
| B20 | Wing Gambit, Sicilian | 1.e4 c5 2.b4 |
| B20 | Marshall Variation, Sicilian | 1.e4 c5 2.b4 cxb4 3.a3 |
| B20 | Wing; Carlsbad Variation, Sicilian | 1.e4 c5 2.b4 cxb4 3.a3 bxa3 |
| B20 | Marienbad Variation, Sicilian | 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2 |
| B20 | Abrahams Variation, Sicilian Wing Gambit | 1.e4 c5 2.b4 cxb4 3.Bb2 |
| B20 | Santasiere Wing Gambit, Sicilian | 1.e4 c5 2.b4 cxb4 3.c4 |
| B20 | Bowlder Attack, Sicilian | 1.e4 c5 2.Bc4 |
| B20 | Slow Sicilian | 1.e4 c5 2.Be2 |
| B22 | Alapin; Sveshnikov Var, Sicilian; B22 | 1.e4 c5 2.c3 |
| B22 | Barmen Defense, Sicilian | 1.e4 c5 2.c3 d5 3.exd5 Qxd5 |
| B22 | Sherzer Variation, Sicilian | 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 e6 5.Nf3 Nc6 |
| B22 | Stoltz Attack, Sicilian | 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3 |
| B20 | Staunton-Cochrane Variation, Sicilian | 1.e4 c5 2.c4 |
| B20 | Gloria Variation, Sicilian | 1.e4 c5 2.c4 d6 3.Nc3 Nc6 4.g3 h5 |
| B20 | Chameleon Variation, Sicilian | 1.e4 c5 2.d3 |
| B20 | Big Clamp Variation, Sicilian | 1.e4 c5 2.d3 Nc6 3.c3 d6 4.f4 |
| B20 | Sicilian Center Game | 1.e4 c5 2.d4 cxd4 |
| B20 | Smith-Morra; Fleissig Gambit, Sic | 1.e4 c5 2.d4 cxd4 3.c3 |
| B20 | Rivadavia Gambit, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 |
| B20 | Push Variation, Smith-Morra Gambit, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 d3 |
| B20 | Dubois Variation, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 d3 4.c4 |
| B20 | Scandanavian Formation, Smith-Morra, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 d5 |
| B20 | Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 |
| B20 | Chicago Defense, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 d6 5.Bc4 e6 6.Nf3 Nf6 7.O-O a6 |
| B20 | Taimanov Formation, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Bc4 a6 6.Nf3 Ne7 |
| B20 | Kan Formation, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 a6 |
| B20 | Fianchetto Defense, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 g6 |
| B20 | Classical Formation, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 a6 7.O-O Nf6 |
| B20 | Scheveningen Formation, Smith-Morra Accepted | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 |
| B20 | Paulsen Formation, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 |
| B20 | Morphy Defense Deferred, Smith-Morra Accepted | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O b5 8.Bb3 Bc5 |
| B20 | Larsen Defense, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O Qc7 8.Qe2 Bd6 |
| B20 | Pin Defense, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bb4 |
| B20 | Morphy Defense, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bc5 |
| B20 | Sozin Formation, Smith-Morra Accepted, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 d6 7.O-O a6 8.Qe2 b5 |
| B20 | Center Formation, Smith-Morra Declined, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 e5 |
| B20 | Alapin Formation, Smith-Morra Declined, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 Nf6 |
| B20 | Wing Formation, Smith-Morra Declined, Sicilian | 1.e4 c5 2.d4 cxd4 3.c3 Qa5 |
| B20 | Halasz Gambit, Sicilian | 1.e4 c5 2.d4 cxd4 3.f4 |
| B20 | Morphy Gambit, Sicilian | 1.e4 c5 2.d4 cxd4 3.Nf3 |
| B20 | Andreaschek Gambit, Sicilian | 1.e4 c5 2.d4 cxd4 3.Nf3 e5 4.c3 |
| B21 | Larsen-Santasiere (McDonnell Attack) Variation, Sicilian; B21 | 1.e4 c5 2.f4 |
| B21 | Tal Gambit, Sicilian | 1.e4 c5 2.f4 d5 3.exd5 Nf6 |
| B20 | Steinitz; Tartakower, Lasker-Dunne Variation, Sicilian | 1.e4 c5 2.g3 |
| B20 | Myers Attack, Sicilian | 1.e4 c5 2.h4 |
| B20 | King David's Opening | 1.e4 c5 2.Ke2 |
| B23 | Closed; Chigorin Variation, Sicilian; B23 | 1.e4 c5 2.Nc3 |
| B23 | Grand Prix Variation, Sicilian | 1.e4 c5 2.Nc3 d6 3.f4 |
| B23 | Marshall Gambit, Sicilian | 1.e4 c5 2.Nc3 e6 3.d4 d5 |
| B23 | Korchnoi Defense, Sicilian | 1.e4 c5 2.Nc3 e6 3.g3 d5 |
| B23 | Traditional Closed Sicilian | 1.e4 c5 2.Nc3 Nc6 |
| B23 | Portland Attack, Sicilian | 1.e4 c5 2.Nc3 Nc6 3.d3 g6 4.g4 |
| B23 | Vinken System, Sicilian; Grand Prix Attack | 1.e4 c5 2.Nc3 Nc6 3.f4 |
| B23 | Schofman Variation, Sicilian | 1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5 |
| B24 | Fianchetto Variation, Sicilian Closed; B24 | 1.e4 c5 2.Nc3 Nc6 3.g3 |
| B25 | B25 | 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 |
| B26 | B26 | 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3 |
| B25 | Botvinnik Defense, Sicilian Closed | 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 |
| B25 | Edge Variation, Sicilian Closed | 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 7.Nh3 Nge7 |
| B23 | Chameleon Sicilian | 1.e4 c5 2.Nc3 Nc6 3.Nge2 |
| B20 | Keres; Billium Attack, Sicilian; Chameleon | 1.e4 c5 2.Ne2 |
| B27 | B27 | 1.e4 c5 2.Nf3 |
| B28 | O'Kelly Variation, Sicilian; B28 | 1.e4 c5 2.Nf3 a6 |
| B28 | Kieseritzky System, Sicilian | 1.e4 c5 2.Nf3 a6 3.b3 |
| B28 | Wing Gambit, Sicilian | 1.e4 c5 2.Nf3 a6 3.b4 |
| B28 | Aronin System, Sicilian | 1.e4 c5 2.Nf3 a6 3.Be2 |
| B28 | Venice System, Sicilian | 1.e4 c5 2.Nf3 a6 3.c3 |
| B28 | Ljubojevic Line, Sicilian | 1.e4 c5 2.Nf3 a6 3.c3 b5 |
| B28 | Gambit Line, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.c3 d5 4.exd5 Nf6 |
| B28 | Steiner Line, Sicilian | 1.e4 c5 2.Nf3 a6 3.c3 d6 |
| B28 | Barcza Line, Sicilian | 1.e4 c5 2.Nf3 a6 3.c3 Nf6 |
| B28 | Maroczy Bind, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.c4 |
| B28 | Robatsch Line, Sicilian | 1.e4 c5 2.Nf3 a6 3.c4 d6 |
| B28 | Paulsen Line, Sicilian | 1.e4 c5 2.Nf3 a6 3.c4 e6 |
| B28 | Geller Line, Sicilian | 1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e5 |
| B28 | Quiet System, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.d3 |
| B28 | Normal System, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.d4 |
| B28 | Cortlever Gambit, Sicilian | 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Bc4 |
| B28 | Smith-Morra Line, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.c3 |
| B28 | Taimanov Line, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e5 |
| B28 | Kan Line, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e6 |
| B28 | Zagorovsky Line, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Qxd4 |
| B28 | Reti System, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.g3 |
| B28 | Yerevan System, O'Kelly Sicilian | 1.e4 c5 2.Nf3 a6 3.Nc3 |
| B27 | Polish Gambit, Sicilian | 1.e4 c5 2.Nf3 b5 |
| B27 | Katalimov Variation, Sicilian | 1.e4 c5 2.Nf3 b6 |
| B50 | Modern Variation, Sicilian; B50 | 1.e4 c5 2.Nf3 d6 |
| B51 | Wing Gambit Deferred, Sicilian | 1.e4 c5 2.Nf3 d6 3.b4 |
| B51 | Moscow Variation, Sicilian; Canal Attack; B51 | 1.e4 c5 2.Nf3 d6 3.Bb5+ |
| B52 | Main Line, Canal Attack, Sicilian; B52 | 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 |
| B52 | Bronstein (Haag) Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.d4 |
| B51 | Moscow Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.c3 a6 6.Bxc6 Bxc6 7.Re1 Nf6 8.d4 Bxe4 9.Bg5 |
| B51 | Dorfman Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.Qe2 g6 6.e5 |
| B50 | Kopec System, Sicilian | 1.e4 c5 2.Nf3 d6 3.Bd3 |
| B50 | Delayed Alapin, Sicilian | 1.e4 c5 2.Nf3 d6 3.c3 |
| B50 | Basman-Palatnik Gambit | 1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Be2 Nc6 5.d4 cxd4 6.cxd4 Nxe4 |
| B53 | B53 | 1.e4 c5 2.Nf3 d6 3.d4 |
| B53 | Tartakower Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.c3 |
| B54 | B54 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 |
| B55 | B55 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 |
| B55 | Ginsberg Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Bc4 |
| B55 | Moscow (Prins) Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 |
| B55 | Venice Attack, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+ |
| B56 | B56 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 |
| B90 | Najdorf Variation, Sicilian; B90 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 |
| B90 | Lipnitzky Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 |
| B92 | Opocensky Variation, Sicilian; B92 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 |
| B92 | Opocensky Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 |
| B90 | Byrne Variation, Sicilian; English Attack | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 |
| B90 | Anti-English, Najdorf Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Ng4 |
| B94 | B94 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 |
| B95 | B95 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 |
| B96 | B96 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 |
| B96 | Polugaevsky; Accelerated Najdorf | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5 |
| B96 | Simagin Line, Najdorf Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2 |
| B98 | B98 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 |
| B98 | Argenitne; Goteborg Var, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 h6 9.Bh4 g5 |
| B98 | Browne Variation, Najdorf Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 h6 9.Bh4 Qc7 |
| B99 | B99 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.O-O-O Nbd7 |
| B97 | Poisoned Pawn Variation, Najdorf Sicilian; B97 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 |
| B97 | Poisoned Pawn Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 |
| B97 | Poisoned Pawn Accepted, Najdorf Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2 |
| B93 | Amsterdam Variation, Sicilian; B93 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 |
| B91 | Zagreb Variation, Sicilian; B91 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 |
| B90 | Adams Attack, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 |
| B90 | Freak Attack, Siicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Rg1 |
| B56 | Kupreichik Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bd7 |
| B56 | Venice Attack, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+ |
| B80 | Scheveingen Variation, Sicilian; B80 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 |
| B80 | Vitolins Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bb5+ |
| B86 | Fischer Attack, Sozin Attack, Sicilian; B86 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 |
| B87 | Flank Variation, Sicilian; B87 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5 |
| B88 | Leonhardt Variation, Sicilian; B88 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 |
| B89 | B89 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 |
| B89 | Sherbakov Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Bb3 O-O 9.O-O Na5 10.f4 b6 |
| B89 | Velimirovic Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Qe2 |
| B83 | Scheveningen Variation, Sicilian; B83 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 |
| B84 | Modern Paulsen, Sicilian; B84 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 |
| B85 | B85 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Be7 |
| B85 | Paulsen Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Qc7 8.f4 Nc6 |
| B80 | English Attack, Scheveningen Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.f3 |
| B81 | Delayed Keres Attack, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4 |
| B81 | Perenyi Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4 e5 8.Nf5 g6 9.g5 |
| B82 | Matanovic Attack, Sicilian; B82 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 |
| B82 | Tal Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Be3 Be7 8.Qf3 |
| B80 | Fianchetto Variation, Scheveningen Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3 |
| B81 | Keres; Panov Variation, Sicilian; B81 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4 |
| B70 | Dragon Variation, Sicilian; B70 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 |
| B70 | Alekhine Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.O-O O-O 8.Nb3 |
| B72 | B72 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 |
| B72 | Nottingham Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Nb3 |
| B73 | B73 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O |
| B73 | Zollner Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.f4 Qb6 |
| B74 | B74 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 |
| B74 | Alekhine Line, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 a5 |
| B74 | Maroczy Line, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 Be6 10.f4 Na5 |
| B74 | Tartakower Line, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 Be6 10.f4 Qc8 |
| B72 | Amsterdam (Battery) Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Qd2 |
| B72 | Grigoriev Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Qd2 O-O 9.O-O-O |
| B75 | B75 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 |
| B76 | Yugoslav Attack, Sicilian Dragon; B76 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O |
| B77 | B77 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 |
| B78 | B78 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O |
| B79 | B79 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O Qa5 |
| B77 | Sosonko Variation, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Nd7 |
| B77 | Czerniak Variation, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Nxd4 10.Bxe4 |
| B76 | Panov Variation, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.g4 |
| B71 | Levenfish Variation, Sicilian; B71 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4 |
| B70 | Fianchetto Variation, Sicilian Dragon | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.g3 |
| B56 | Classical Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 |
| B57 | Sozin; Velimirovic Attack, Sicilian; B57 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 |
| B57 | Anti-Sozin Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6 |
| B56 | Yates Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bd3 |
| B58 | B58 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 |
| B58 | Boleslavsky Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 |
| B59 | B59 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 |
| B58 | Louma Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6 |
| B60 | Richter-Rauzer Variation, Sicilian; B60 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 |
| B62 | B62 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 |
| B62 | Margate (Vitolins) Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Bb5 |
| B62 | Podebrady Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nb3 |
| B62 | Exchange Variation, Richter-Rauzer Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nxc6 |
| B63 | Rauzer Variation, Sicilian; B63 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 |
| B66 | B66 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 |
| B67 | B67 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 |
| B68 | B68 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7 |
| B69 | B69 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6 |
| B64 | B64 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 |
| B65 | B65 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 Nxd4 10.Qxd4 |
| B63 | Ivanov Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Qb6 |
| B60 | Dragon Variation, Richter-Rauzer Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 g6 |
| B58 | Fianchetto Variation, Richter-Rauzer Sicilizn | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.g3 |
| B56 | Spielmann Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Nde2 |
| B61 | B61 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Qd2 |
| B53 | Chekhover Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 |
| B53 | Zaitsev Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7 |
| B53 | Lazy Knight Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 Nd7 |
| B53 | Cortlever Variation, Sicilian | 1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.dxc5 Nxe4 5.cxd6 |
| B50 | Kotov Gambit, Sicilian | 1.e4 c5 2.Nf3 d6 3.g3 b5 |
| B27 | Jalalabad Variation, Sicilian | 1.e4 c5 2.Nf3 e5 |
| B40 | French Variation, Sicilian; B40 | 1.e4 c5 2.Nf3 e6 |
| B40 | Wing Gambit Deferred, Sicilian | 1.e4 c5 2.Nf3 e6 3.b4 |
| B40 | Kramnik Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.c4 |
| B41 | B41 | 1.e4 c5 2.Nf3 e6 3.d4 |
| B41 | Accelerated Wimpy Variation, Sic | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 |
| B41 | Paulsen; Kan Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 |
| B42 | B42 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 |
| B42 | Polugaevsky Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5 |
| B42 | Swiss Cheese Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6 |
| B41 | Reti Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 |
| B41 | Hedgehog Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 g6 |
| B41 | Bronstein Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6 |
| B43 | B43 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 |
| B44 | Taimanov; Bastrikov, Paulsen Variation, Sicilian; B44 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 |
| B44 | Szen Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 |
| B44 | Gary Gambit, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 d5 |
| B45 | B45 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 |
| B46 | B46 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 |
| B46 | Taimanov Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 Nge7 |
| B45 | Paulsen Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 |
| B45 | American Attack, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.Nd6+ |
| B47 | Bastrikov Variation, Sicilian; B47 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 |
| B48 | B48 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 |
| B49 | B49 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2 |
| B47 | Ponomariov Gambit, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6 |
| B41 | Anderssen; Counterattack Var, Sic | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 |
| B41 | Pin Variation; Sicilian CounterAttack | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 |
| B41 | Jaffe Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5 |
| B41 | Koch Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5 |
| B45 | Four Knights Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 |
| B45 | Cobra Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 Bc5 |
| B40 | Gaw-Paw Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Qb6 |
| B40 | Kveinis Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6 |
| B41 | Marshall Variation, Sicilian | 1.e4 c5 2.Nf3 e6 3.d4 d5 |
| B27 | Brussels Gambit, Sicilian | 1.e4 c5 2.Nf3 f5 |
| B27 | Double-Dutch Gambit, Sicilian | 1.e4 c5 2.Nf3 f5 3.exf5 Nh6 |
| B27 | Hyperaccelerated Dragon, Sicilian | 1.e4 c5 2.Nf3 g6 |
| B27 | Action Extension, Sicilian | 1.e4 c5 2.Nf3 g6 3.c4 Bh6 |
| B27 | Hyperaccelerated Pterodactyl, Sic | 1.e4 c5 2.Nf3 g6 3.d4 Bg7 |
| B27 | Frederico Variation, Sicilian | 1.e4 c5 2.Nf3 g6 3.d4 f5 |
| B27 | Sicilian Fred | 1.e4 c5 2.Nf3 g6 3.d4 f5 |
| B27 | Buecker Variation, Sicilian | 1.e4 c5 2.Nf3 h6 |
| B30 | Old Sicilian | 1.e4 c5 2.Nf3 Nc6 |
| B30 | Rossolimo (Nezmetdinov) Variation, Sicilian; B30 | 1.e4 c5 2.Nf3 Nc6 3.Bb5 |
| B31 | B31 | 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 |
| B31 | Gufeld Gambit, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 e5 6.d4 |
| B31 | Lutikov Gambit, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.d4 |
| B31 | Gurgenidze Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Re1 e5 6.b4 |
| B31 | San Francisco Gambit, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.Bb5 Na5 4.b4 |
| B32 | B32 | 1.e4 c5 2.Nf3 Nc6 3.d4 |
| B32 | Nimzovich Variation, Sicilian; Nimzo-American Variation | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5 |
| B32 | Bourdonnais; Lowenthal Var, Sic | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 |
| B32 | Kalashnikov Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 |
| B34 | Accelerated Dragon; Fianchetto Var; B34 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 |
| B36 | Maroczy Bind, Sicilian; B36 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 |
| B37 | B37 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 |
| B38 | B38 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 |
| B39 | Breyer Variation, Sicilian; B39 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4 |
| B36 | Gurgenidze Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6 |
| B35 | B35 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 |
| B33 | B33 | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 |
| B33 | Four Knights Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 |
| B33 | Lasker-Pelikan Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 |
| B33 | Pelikan Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 |
| B33 | Chelyabinsk Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 |
| B33 | Sveshnikov Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 |
| B33 | Bird Variation, Siclian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 Be6 |
| B32 | Retreat Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nf3 |
| B32 | Godiva Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6 |
| B32 | Flohr Variation, Sicilian | 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qc7 |
| B29 | Nimzovich; Rubinstein Var, Sicilian; B29 | 1.e4 c5 2.Nf3 Nf6 |
| B29 | Advance Variation, Sicilian | 1.e4 c5 2.Nf3 Nf6 3.e5 |
| B27 | Mongoose Variation, Sicilian | 1.e4 c5 2.Nf3 Qa5 |
| B27 | Althouse; Stiletto Variation, Sicilian | 1.e4 c5 2.Nf3 Qa5 |
| B27 | Accelerated Paulsen, Sicilian | 1.e4 c5 2.Nf3 Qc7 |
| B27 | Quinteros Variation, Sicilian | 1.e4 c5 2.Nf3 Qc7 |
| B20 | Brick Variation, Sicilian | 1.e4 c5 2.Nh3 |
| B10 | Caro-Kann Defense; B10 | 1.e4 c6 |
| B10 | Hillbilly Attack, Caro-Kann | 1.e4 c6 2.Bc4 |
| B10 | Modern; English Variation, Accelerated Panov; Caro-Kann | 1.e4 c6 2.c4 |
| B10 | Breyer Variation, Caro-Kann | 1.e4 c6 2.d3 |
| B10 | Stein Attack, Caro-Kann | 1.e4 c6 2.d3 d5 3.Nd2 g6 4.g3 Bg7 5.Bg2 e5 6.Ngf3 Ne7 7.O-O O-O 8.b4 |
| B12 | B12 | 1.e4 c6 2.d4 |
| B12 | Landau Gambit, Caro-Kann | 1.e4 c6 2.d4 d5 3.Bd3 Nf6 4.e5 Nfd7 6.e6 |
| B12 | Mieses Gambit, Caro | 1.e4 c6 2.d4 d5 3.Be3 |
| B12 | Diemer-Duhm Gambit, Caro | 1.e4 c6 2.d4 d5 3.c4 |
| B12 | Advance Variation, Caro | 1.e4 c6 2.d4 d5 3.e5 |
| B12 | Prins Attack, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 |
| B12 | Bayonet Variation, Caro | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.g4 |
| B12 | Tal Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4 |
| B12 | Van der Wiel Attack, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 |
| B12 | Dreyev Defense, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 Qb6 |
| B12 | Bronstein Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Ne2 |
| B12 | Short Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 |
| B12 | Botvinnik-Carls Defense, Caro-Kann | 1.e4 c6 2.d4 d5 3.e5 c5 |
| B13 | Exchange Variation, Caro; B13 | 1.e4 c6 2.d4 d5 3.exd5 |
| B13 | Rubinstein Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.exd5 cxd3 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 |
| B13 | Panov-Botvinnik; Gunderam Attack | 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 |
| B14 | B14 | 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 |
| B14 | Carlsbad Line, Caro-Kann | 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 |
| B14 | Czerniak Line, Caro-Kann | 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5 |
| B14 | Reifir-Spielmann Line, Caro-Kann | 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6 |
| B12 | Maroczy Variation, Caro | 1.e4 c6 2.d4 d5 3.f3 |
| B12 | Fantasy; Lilienfisch Variation, Caro | 1.e4 c6 2.d4 d5 3.f3 |
| B12 | Maroczy Gambit, Caro-Kann | 1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4 |
| B15 | B15 | 1.e4 c6 2.d4 d5 3.Nc3 |
| B15 | Gurgenidze Variation, Caro | 1.e4 c6 2.d4 d5 3.Nc3 b5 |
| B15 | Von Hennig Gambit, Caro | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4 |
| B15 | Milner-Barry Gambit, Caro; Rasa-Studier Gambit | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.f3 |
| B18 | Classical Variation, Caro; B18 | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 |
| B19 | B19 | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 |
| B19 | Seirawan Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.e5 Bh7 9.Bd3 Bxd3 10.Qxd3 |
| B18 | Flohr Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nh3 |
| B16 | Finnish Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 h6 |
| B17 | Karpov Variation, Caro-Kann; B17 | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 |
| B17 | Smyslov Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 |
| B17 | Tiviakov-Fischer Attack, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6 |
| B17 | Kasparov Attack, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Ng3 |
| B17 | Ivanchuk Defense, Caro Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Ndf6 |
| B15 | Knight Variation, Caro | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 |
| B15 | Tarrasch (Alekhine) Gambit, Caro | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Bd3 |
| B15 | Tartakower Variation, Caro | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 |
| B15 | Forgacs Variation, Caro Kann | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4 |
| B16 | Nimzovich; Bronstein-Larsen, Caro; B16 | 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6 |
| B15 | Gurgenidze System, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nc3 g6 |
| B15 | Gurgenidze Variation, Caro | 1.e4 c6 2.d4 d5 3.Nc3 g6 4.e5 Bg7 5.f4 h5 |
| B15 | Campomanes Attack, Caro | 1.e4 c6 2.d4 d5 3.Nc3 Nf6 |
| B12 | Modern Variation, Caro-Kann | 1.e4 c6 2.d4 d5 3.Nd2 |
| B12 | New Caro-Kann | 1.e4 c6 2.d4 d5 3.Nd2 g6 |
| B12 | Edinburgh Variation, Caro | 1.e4 c6 2.d4 d5 3.Nd2 Qb6 |
| B12 | Ulysses Gambit, Caro | 1.e4 c6 2.d4 d5 3.Nf3 dxe4 4.Ng5 |
| B10 | Massachussets Defense, Caro-Kann | 1.e4 c6 2.d4 f5 |
| B12 | De Bruycker Defense, Caro | 1.e4 c6 2.d4 Na6 |
| B10 | Masi Variation, Caro-Kann | 1.e4 c6 2.d4 Nf6 |
| B11 | B11 | 1.e4 c6 2.Nc3 |
| B10 | Scorpion-Horus Gambit, Caro-Kann | 1.e4 c6 2.Nc3 d5 3.d3 dxe4 4.Bg5 |
| B11 | Two Knights Attack, Caro Kann | 1.e4 c6 2.Nc3 d5 3.Nf3 |
| B11 | Mindeno Variation, Caro-Kann | 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 |
| B11 | Retreat Line, Mindeno Variation, Caro-Kann | 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bh5 |
| B12 | Hector Gambit, Caro | 1.e4 c6 2.Nc3 d5 3.Nf3 dxe4 4.Ng5 |
| B10 | Goldman Variation, Caro | 1.e4 c6 2.Nc3 d5 3.Qf3 |
| B10 | Two Knights Variation, Caro | 1.e4 c6 2.Nf3 d5 3.Nc3 |
| B01 | Center Counter; Scandanavian; B01 | 1.e4 d5 |
| B01 | Zilbermints Gambit, Center Counter | 1.e4 d5 2.b4 |
| B01 | Blackbunre-Kloosterboer Gambit, Center Counter | 1.e4 d5 2.exd5 c6 3.dxc6 e5 |
| B01 | Atkinson (Kloosterboer) Variation, Center Counter | 1.e4 d5 2.exd5 c6 3.dxc6 e5 |
| B01 | Blackburne Gambit, Center Counter | 1.e4 d5 2.exd5 c6 3.dxc6 Nxc6 |
| B01 | Boehnke Gambit, Center Counter | 1.e4 d5 2.exd5 e5 |
| B01 | Boehnke Gambit Accepted, Center Counter | 1.e4 d5 2.exd5 e5 3.dxe6 Bxe6 |
| B01 | Marshall Gambit, Scandanavian G; Modern Variation, CC | 1.e4 d5 2.exd5 Nf6 |
| B01 | Panov Transfer, Center Counter | 1.e4 d5 2.exd5 Nf6 3.c4 c6 |
| B01 | Icelandic-Palme Gambit, CC | 1.e4 d5 2.exd5 Nf6 3.c4 e6 |
| B01 | Portuguese Variation, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 |
| B01 | Portuguese Gambit, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7 |
| B01 | Kadas Gambit, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 c6 4.dxc6 e5 |
| B01 | Wing Gambit, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 g6 4.c4 b5 |
| B01 | Marshall Variation, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 |
| B01 | Kiel Variation, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb4 |
| B01 | Tomalty Gambit, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nf6 5.Nc3 c5 |
| B01 | Gipslis Variation, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4 |
| B01 | Richter Variation, Center Counter | 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6 |
| B01 | Mieses-Kotroc Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 |
| B01 | Leonhardt (Rosen) Gambit, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.b4 |
| B01 | Anderssen Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 |
| B01 | Collijn Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 Bg4 |
| B01 | Mieses Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 |
| B01 | Gruenfeld Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Ne5 c6 7.g4 |
| B01 | Lasker Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3 |
| B01 | Gubinsky-Melts Defense, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 |
| B01 | Schiller-Pytel Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 c6 |
| B01 | Bronstein Variation, Center Counter | 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 a6 |
| B01 | Closed Scandavian | 1.e4 d5 2.Nc3 |
| B07 | B07 | 1.e4 d6 |
| B07 | Maroczy Defense, Pirc | 1.e4 d6 2.d4 e5 |
| B07 | Philidor Gambit, Pirc | 1.e4 d6 2.d4 e5 3.dxe5 Bd7 |
| B07 | Small Center Defense | 1.e4 d6 2.d4 e6 |
| B07 | Balogh Defense, Pirc | 1.e4 d6 2.d4 f5 |
| B07 | Pirc Defense | 1.e4 d6 2.d4 Nf6 |
| B07 | Lion's Jaw, Pirc | 1.e4 d6 2.d4 Nf6 3.f3 |
| B07 | Czech Defense | 1.e4 d6 2.d4 Nf6 3.Nc3 c6 |
| B07 | Pirc; Ufimtsev; Antal Defense | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 |
| B07 | Kholmov System, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bc4 |
| B07 | Classical System, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 |
| B07 | Chinese Variation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.g4 |
| B07 | Bayonet Attack, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.h4 |
| B07 | Sveshnikov-Jansa Attack, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.h3 |
| B07 | 150 Attack | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.Qd2 |
| B07 | Panov; Opatijav; Byrne Variation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5 |
| B09 | Austrian Attack, Pirc; B09 | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 |
| B09 | Ljubojevic Variation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4 |
| B09 | Austrian; Yugoslav Defense, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 |
| B09 | Dragon Formation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 c5 |
| B09 | Weiss Variation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 |
| B09 | Kurajica Variation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3 |
| B09 | Unzicker Attack, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5 |
| B08 | B08 | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 |
| B08 | Two Knights System, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 |
| B08 | Quiet System, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 |
| B08 | Parma Defense, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4 |
| B08 | Czech Defense, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O c6 |
| B08 | Chigorin Line, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Nc6 |
| B08 | Schlechter Variation, Pirc | 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3 |
| B07 | Anti-Philidor | 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4 |
| B07 | Roscher Gambit, Pirc | 1.e4 d6 2.d4 Nf6 3.Nf3 |
| C20 | King Pawn Game; C20 | 1.e4 e5 |
| C20 | Mengarini Opening | 1.e4 e5 2.a3 |
| C20 | Portuguese Opening | 1.e4 e5 2.Bb5 |
| C20 | Miguel Gambit | 1.e4 e5 2.Bb5 Bc5 3.b4 |
| C23 | Bishop's Opening; C23 | 1.e4 e5 2.Bc4 |
| C23 | Anderssen Gambit | 1.e4 e5 2.Bc4 b5 3.Bxb5 c6 |
| C23 | Thorold Gambit | 1.e4 e5 2.Bc4 b5 3.Bxb5 f5 |
| C23 | Classical Variation, Bishop; Boi Variation | 1.e4 e5 2.Bc4 Bc5 |
| C23 | MacDonnell Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.b4 |
| C23 | Labourdonnais-Denker Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.c3 |
| C23 | McDonnell Double Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.f4 |
| C23 | Philidor Variation, Bishop | 1.e4 e5 2.Bc4 Bc5 3.c3 |
| C23 | Lewis Counter-Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.c3 d5 |
| C23 | Lewis Countergambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6 |
| C23 | Walker Variation, Bishop | 1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6 5.d4 |
| C23 | Lewis Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.d4 |
| C23 | Stein Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.f4 |
| C23 | Lopez Variation, Bishop | 1.e4 e5 2.Bc4 Bc5 3.Qe2 |
| C23 | Lopez Gambit, Bishop | 1.e4 e5 2.Bc4 Bc5 3.Qe2 Nf6 4.f4 |
| C23 | Khan Gambit, Bishop | 1.e4 e5 2.Bc4 d5 |
| C23 | King's Gambit Reversed, Bishop | 1.e4 e5 2.Bc4 f5 |
| C23 | Calabrese Counter-Gambit | 1.e4 e5 2.Bc4 f5 |
| C24 | Berlin Defense, Bishop; C24 | 1.e4 e5 2.Bc4 Nf6 |
| C24 | Spielmann Attack, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d3 Bc5 4.Nc3 |
| C24 | Kitchner Folly, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d3 Be7 4.Nf3 O-O |
| C24 | Vienna Hybrid, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3 |
| C24 | Hromadka Variation, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3 Bb4 5.Ne2 |
| C24 | Ponziani Center Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d4 |
| C24 | Warsaw Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.c3 |
| C24 | Urusov; Ouroussoff; Keidansky G | 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3 |
| C24 | Keidansky Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3 Nxe4 5.Qxd4 |
| C23 | Kreijcik Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.f3 Bc5 4.Ne2 Nc6 5.b4 |
| C23 | Greco Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.f4 |
| C23 | Horwitz Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.Nc3 b5 |
| C23 | Blanel Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.Nc3 Nxe4 |
| C23 | Paschmann Gambit, Bishop | 1.e4 e5 2.Bc4 Nf6 3.Ne2 Nxe4 4.Nec3 |
| C20 | Tortoise Opening | 1.e4 e5 2.Bd3 |
| C20 | Macleod Attack | 1.e4 e5 2.c3 |
| C20 | Norwalder Gambit | 1.e4 e5 2.c3 d5 3.Qh5 Bd6 |
| C20 | Lasa Gambit | 1.e4 e5 2.c3 f5 |
| C20 | Whale Opening | 1.e4 e5 2.c4 |
| C20 | Bavarian Gambit | 1.e4 e5 2.c4 d5 |
| C20 | Clam Variation; Leonardis Variation | 1.e4 e5 2.d3 |
| C20 | Indian Opening | 1.e4 e5 2.d3 |
| C20 | Weber Gambit | 1.e4 e5 2.d3 d5 3.exd5 c6 4.dxc6 Nxc6 |
| C20 | King's Gambit Reversed | 1.e4 e5 2.d3 f5 |
| C20 | Radisch Gambit | 1.e4 e5 2.d3 Nf6 3.f4 Bc5 |
| C21 | Center Game; C21 | 1.e4 e5 2.d4 |
| C21 | Beyer Gambit | 1.e4 e5 2.d4 d5 |
| C21 | Philidor Gambit | 1.e4 e5 2.d4 d6 3.dxe5 Bd7 |
| C21 | Center Game Accepted | 1.e4 e5 2.d4 exd4 |
| C21 | Von der Lasa Gambit | 1.e4 e5 2.d4 exd4 3.Bc4 |
| C21 | Ross Gambit, Center | 1.e4 e5 2.d4 exd4 3.Bd3 |
| C21 | Danish Gambit | 1.e4 e5 2.d4 exd4 3.c3 |
| C21 | Sorensen Defense, Center | 1.e4 e5 2.d4 exd4 3.c3 d5 |
| C21 | Danish Gambit Accepted | 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 |
| C21 | Copenhagen Defense, Danish Gambit | 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+ |
| C21 | Schlechter Defense, Center | 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 d5 |
| C21 | Classical Defense, Danish Gambit | 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Nf6 |
| C21 | Chigorin Defense, Danish Gambit | 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Qe7 |
| C21 | Svenonius Defense, Center | 1.e4 e5 2.d4 exd4 3.c3 Ne7 |
| C21 | Halasz-McDonnell Gambit | 1.e4 e5 2.d4 exd4 3.f4 |
| C21 | Crocodile Variation, Center Game | 1.e4 e5 2.d4 exd4 3.f4 Bc5 4.Nf3 Nc6 5.c3 |
| C21 | Lanc-Arnold Gambit, Center | 1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3 |
| C21 | Scippler Gambit, Center | 1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3 dxc3 5.Bc4 |
| C22 | C22 | 1.e4 e5 2.d4 exd4 3.Qxd4 |
| C22 | Hall Variation, Center | 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qc4 |
| C22 | Paulsen Attack Variation, Center | 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 |
| C22 | Berger Variation, Center | 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Nf6 |
| C22 | Kupreichik Variation, Center | 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Nf6 5.Nc3 Bb4 6.Bd2 O-O 7.O-O-O Re8 8.Bc4 |
| C20 | King's Head | 1.e4 e5 2.f3 |
| C20 | Walkerling | 1.e4 e5 2.f3 Nf6 |
| C20 | Krejcik Gambit | 1.e4 e5 2.f3 Nf6 3.Bc4 Bc5 4.Ne2 Nc6 5.b4 |
| C20 | King's Head Opening | 1.e4 e5 2.f3 Nf6 3.Nc3 |
| C30 | King's Gambit; C30 | 1.e4 e5 2.f4 |
| C30 | Classical Defense, KGD | 1.e4 e5 2.f4 Bc5 |
| C30 | Heath Variation, KGD; Rotlewi Countergambit | 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.b4 |
| C30 | Marshall (Euwe) Attack, KGD | 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 Bg4 5.fxe5 dxe5 6.Qa4+ |
| C30 | Rubinstein Countergambit, KGD | 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 f5 |
| C30 | Svenonius Variation, KGD | 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.Nc3 Nf6 5.Bc4 Nc6 6.d3 Bg4 |
| C30 | Senechaud Counter-Gambit, KGD | 1.e4 e5 2.f4 Bc5 3.Nf3 g5 |
| C30 | Mafia Defense, KGD | 1.e4 e5 2.f4 c5 |
| C31 | Falkbeer Counter-Gambit, KGD; C31 | 1.e4 e5 2.f4 d5 |
| C31 | Hinrichsen Gambit, KGD | 1.e4 e5 2.f4 d5 3.d4 |
| C31 | Falkbeer Countergambit Accepted, KGD | 1.e4 e5 2.f4 d5 3.exd5 |
| C31 | Miles Gambit, KGD | 1.e4 e5 2.f4 d5 3.exd5 Bc5 |
| C31 | Nimzovich-Marshall Variation, KGD | 1.e4 e5 2.f4 d5 3.exd5 c6 |
| C31 | Marshall C-G, KGD | 1.e4 e5 2.f4 d5 3.exd5 c6 |
| C31 | Pickler Gambit, KGD | 1.e4 e5 2.f4 d5 3.exd5 c6 4.dxc6 Bc5 |
| C32 | Staunton Line, KGD; C32 | 1.e4 e5 2.f4 d5 3.exd5 e4 |
| C31 | Nimzovich Variation, KGD; Anderssen Attack | 1.e4 e5 2.f4 d5 3.exd5 e4 4.Bb5+ |
| C32 | Reti (Charousek) Variation, KGD | 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 |
| C32 | Morphy Defense, KGD | 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nc3 Bb4 6.Bd2 e3 |
| C32 | Keres Variation, KGD | 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nd2 |
| C32 | Old Line, Falkbeer Countergambit, KGD | 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Qe2 |
| C32 | Modern Transfer, Falkbeer Countergambit, KGD | 1.e4 e5 2.f4 d5 3.exd5 exf4 |
| C31 | Blackbunre Attack, KGD | 1.e4 e5 2.f4 d5 3.Nf3 |
| C33 | King's Gambit Accepted; C33 | 1.e4 e5 2.f4 exf4 |
| C33 | Orsini Gambit, KGA | 1.e4 e5 2.f4 exf4 3.b3 |
| C33 | Schurig Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Bb5 |
| C33 | Bishop's Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 |
| C33 | Kieseritzky Gambit, Bishop's Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 b5 |
| C33 | Lopez Defense, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 c6 |
| C33 | Bledow; Morphy Defense, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 d5 |
| C33 | Bledow Countergambit, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 Nf6 |
| C33 | Gianutio Counter-Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 f5 |
| C33 | Anderssen Defense, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 g5 |
| C33 | Maurian Defense, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Nc6 |
| C33 | Cozio; Hanneken; Prussian; Lichtenhein | 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 |
| C33 | Bogoljubow Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 |
| C33 | Bogoljubov; Jaenisch Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 c6 |
| C33 | Bryan; Kieseritzky Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 b5 |
| C33 | Greco Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Bc5 |
| C33 | Cozio Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d6 |
| C33 | Classical Defense, KGA; Lopez Variation | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 |
| C33 | Grimm Attack, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 d6 7.e5 |
| C33 | MacDonnell Attack, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 Ne7 7.g3 |
| C33 | McDonnell Attack, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 |
| C33 | Fraser Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 fxg3 7.Qf3 |
| C33 | Cozio Attack, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Qf3 |
| C33 | Boden Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nc6 |
| C33 | Jaenisch Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nf6 |
| C33 | Jaenisch Variation, KGA | 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Qf6 |
| C33 | Lesser Bishop; Tartakower | 1.e4 e5 2.f4 exf4 3.Be2 |
| C33 | Weiss Defense, KGA | 1.e4 e5 2.f4 exf4 3.Be2 f5 4.exf5 d6 |
| C33 | Central; Polerio; Willemson, Steinitz | 1.e4 e5 2.f4 exf4 3.d4 |
| C33 | Gaga Gambit, KGA | 1.e4 e5 2.f4 exf4 3.g3 |
| C33 | Gama Gambit, KGA | 1.e4 e5 2.f4 exf4 3.g3 fxg3 4.Nf3 |
| C33 | Leonardo (Stamma) Gambit, KGA | 1.e4 e5 2.f4 exf4 3.h4 |
| C33 | Drunken King, KGA | 1.e4 e5 2.f4 exf4 3.Kf2 |
| C33 | Tumbleweed; King's Own, KGA | 1.e4 e5 2.f4 exf4 3.Kf2 |
| C33 | Keres, Mason, Parnu, Requena | 1.e4 e5 2.f4 exf4 3.Nc3 |
| C33 | Requena Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nc3 Qh4+ |
| C33 | Paris Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Ne2 |
| C34 | King's Knight Gambit, KGA; C34 | 1.e4 e5 2.f4 exf4 3.Nf3 |
| C35 | Cunningham Gambit, KGA; C35 | 1.e4 e5 2.f4 exf4 3.Nf3 Be7 |
| C35 | Wild Cunningham Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ |
| C35 | Bertin; Three Pawns Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ 5.g3 |
| C35 | Neo-Cunningham Gambit, KGA; McCormick Defense | 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Nf6 |
| C36 | Scandinavian Variation, KGA; Modern Defense, KGA; C36 | 1.e4 e5 2.f4 exf4 3.Nf3 d5 |
| C36 | Abbazia Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 d5 4.exd5 Nf6 |
| C34 | Fischer Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 d6 |
| C34 | Schulder Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 d6 4.b4 |
| C34 | Gianutio Countergambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 f5 |
| C37 | C37 | 1.e4 e5 2.f4 exf4 3.Nf3 g5 |
| C37 | Ghulam Kassim; Koch Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 |
| C38 | Traditional Variation, KGA; C38 | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 |
| C38 | Mayet Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.d4 d6 6.c3 |
| C38 | Philidor Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 |
| C38 | Greco Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 |
| C38 | Greco; Calabrian Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.hxg5 hxg5 8.Rxh8 Rxh8 9.Nc3 |
| C38 | Schultz Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.Qd3 |
| C38 | Hanstein Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.O-O |
| C37 | Middleton Counter-Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 d6 5.O-O Bg4 6.h3 h5 7.hxg4 |
| C37 | Greco-Lolli; Wild Muzio Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Bxf7+ |
| C37 | Young Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Bxf7+ Kxf7 6.O-O gxf3 7.Qxf3 Qf6 8.d4 Qxd4+ 9.Be3 |
| C37 | Koch; Ghulam Kassim Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 |
| C37 | Kotov Gambit | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Bxf4 |
| C37 | Ghulam-Kassim Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Qxf3 |
| C37 | Australian Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.h4 |
| C37 | MacDonnell Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Nc3 |
| C37 | Salvio Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 |
| C37 | Cochrane Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 f3 |
| C37 | Herzfeld; Portuguese; Vienna, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nc6 |
| C37 | Santa Maria Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nf6 |
| C37 | Silberschmidt Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6 |
| C37 | Anderssen Counter-Attack, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6 7.d4 d6 |
| C37 | Muzio-Polerio Gambit, KGA; Wild Muzio | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O |
| C37 | Brentano Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O d5 |
| C37 | Holloway Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Nc6 |
| C37 | From Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qe7 |
| C37 | Sarratt Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 |
| C37 | Young Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Bxf7+ Kxf7 8.d4 Qxd4+ 9.Be3 Qf6 |
| C37 | Double Muzio Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.e5 Qxe5 8.Bxf7+ |
| C37 | Paulsen Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.e5 Qxe5 8.d3 Bh6 9.Nc3 Ne7 10.Bd2 |
| C37 | Bello Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3 |
| C37 | Baldwin Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3 Qd4+ 8.Kh1 Qxc4 9.Nd5 |
| C37 | Kling & Horwitz Counter-Attack, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O Qe7 |
| C37 | Blachy Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Nc6 |
| C37 | Rosentreter Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 |
| C37 | Soerensen Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Nc3 |
| C37 | Sorensen Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5 |
| C37 | Bird Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5 Qh4+ 6.g3 |
| C37 | Rosentreter-Testa Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 g4 5.Bxf4 |
| C39 | C39 | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 |
| C39 | Kieseritzky Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 |
| C39 | Paulsen Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Bg7 |
| C39 | Campbell; Brentano; Morphy Var, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 d5 |
| C39 | Green; Kolisch Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 d6 |
| C39 | Long Whip Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h5 |
| C39 | Cotter Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h6 6.Nxf7 |
| C39 | Neumann Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nc6 |
| C39 | Berlin Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 |
| C39 | Anderssen Defense, Kieseritsky Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 |
| C39 | Anderssen-Cordel Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.d4 Nh5 9.Bxf4 Nxf4 |
| C39 | Rice Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O |
| C39 | Rice Gambit Accepted, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O Bxe5 |
| C39 | Paulsen Defense Deferred, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bg7 |
| C39 | Rubinstein Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.d4 |
| C39 | Riviere Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Nxg4 d5 |
| C39 | Rosenthal; Stockwhip Var, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Qe7 |
| C39 | Allgaier; Cotter Cambit, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 |
| C39 | Walker (Urusov) Attack, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+ |
| C39 | Urusov Attack, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+ d5 8.Bxd5+ Ke8 9.d4 |
| C39 | Thorold Attack, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.d4 |
| C39 | Horny Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Qxg4 Nf6 8.Qxf4 |
| C37 | Quaade; Taylor Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Nc3 |
| C34 | Becker; Anti-Kieseritzky Var, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 h6 |
| C34 | MacLeod Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 Nc6 |
| C34 | Bonsch-Osmolovsky Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 Ne7 |
| C34 | Schallop Defense, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 Nf6 |
| C34 | Tashkent Attack, KGA | 1.e4 e5 2.f4 exf4 3.Nf3 Nf6 4.e5 Nh5 5.g4 |
| C33 | Eisenberg Variation, KGA | 1.e4 e5 2.f4 exf4 3.Nh3 |
| C33 | Basman Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Qe2 |
| C33 | Bilguer-Mirage Variation, KGA | 1.e4 e5 2.f4 exf4 3.Qe2 |
| C33 | Breyer; Hungarian; Carrera, KGA | 1.e4 e5 2.f4 exf4 3.Qf3 |
| C33 | Dodo Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Qg4 |
| C33 | Carrera Gambit, KGA | 1.e4 e5 2.f4 exf4 3.Qh5 |
| C30 | Panteldakis Countergambit, KGD | 1.e4 e5 2.f4 f5 |
| C30 | Soller-Zilbermints Gambit, KGD | 1.e4 e5 2.f4 f6 3.fxe5 Nc6 |
| C30 | Zilbermints Double Countergambit; KGD | 1.e4 e5 2.f4 g5 |
| C30 | Queen's Knight Defense, KGD | 1.e4 e5 2.f4 Nc6 |
| C30 | Miles Defense, KGD | 1.e4 e5 2.f4 Nc6 3.Nf3 f5 |
| C30 | Zilbermints Double Gambit I, KGD | 1.e4 e5 2.f4 Nc6 3.Nf3 g5 |
| C30 | Petrov's Defense, KGD | 1.e4 e5 2.f4 Nf6 |
| C30 | Norwalde (Norwalder) Variation, KGD | 1.e4 e5 2.f4 Qf6 |
| C30 | Schubert Variation, KGD | 1.e4 e5 2.f4 Qf6 3.Nc3 Qxf4 4.d4 |
| C30 | Keene Defense, KGD | 1.e4 e5 2.f4 Qh4+ 3.g3 Qe7 |
| C25 | Vienna; Hamppe Opening; C25 | 1.e4 e5 2.Nc3 |
| C25 | Zhuravlev Counter-Gambit, Vienna | 1.e4 e5 2.Nc3 Bb4 3.Qg4 |
| C25 | Zhuraviev Countergambit, Vienna | 1.e4 e5 2.Nc3 Bb4 3.Qg4 Nf6 |
| C25 | Anderssen Defense, Vienna | 1.e4 e5 2.Nc3 Bc5 |
| C25 | Hamppe-Mietner Variation, Vienna | 1.e4 e5 2.Nc3 Bc5 3.Na4 |
| C25 | Giraffe Attack, Vienna | 1.e4 e5 2.Nc3 Bc5 3.Qg4 |
| C25 | Omaha Gambit, Vienna | 1.e4 e5 2.Nc3 d6 3.f4 |
| C23 | Meitner-Mieses Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.Bc4 Bc5 4.Qg4 Qf6 5.Nd5 |
| C23 | Bronstein Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.f4 Nxe4 5.Nf3 |
| C25 | Fyfe Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.d4 |
| C25 | Philidor Countergambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.d4 f5 |
| C25 | Alapin Variation, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 |
| C25 | Vienna Gambit | 1.e4 e5 2.Nc3 Nc6 3.f4 |
| C25 | Quelle Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 Bc5 4.fxe5 d6 |
| C25 | Steinitz Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 |
| C25 | Fraser-Minckwitz Variation, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6 |
| C25 | Zukertort Defense, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5 |
| C25 | Paulsen Defense, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d6 |
| C25 | Soerensen Defense, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 g5 |
| C25 | Knight Variation, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 |
| C25 | Cunningham Defense, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 Be7 |
| C25 | Hamppe-Muzio Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-O |
| C25 | Pierce Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4 |
| C25 | Hamppe-Allgaier Gambit, Vienna | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 |
| C25 | Hamppe-Allgaier-Thorold Gambit | 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 h6 7.Nxf7 Kxf7 8.d4 |
| C25 | Paulsen Variation, Vienna | 1.e4 e5 2.Nc3 Nc6 3.g3 |
| C25 | Mariotti Gambit | 1.e4 e5 2.Nc3 Nc6 3.g3 Bc5 4.Bg2 h5 5.Nf3 h4 |
| C26 | Falkbeer Variation, Vienna; C26 | 1.e4 e5 2.Nc3 Nf6 |
| C26 | Mengarini Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.a3 |
| C27 | Stanley Variation, Vienna; C27 | 1.e4 e5 2.Nc3 Nf6 3.Bc4 |
| C27 | Reversed Spanish, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bb4 |
| C27 | Bishop Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5 |
| C27 | Eifel Gambit, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5 4.Nge2 b5 |
| C28 | Three Knights Variation, Vienna; C28 | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6 |
| C27 | Modern Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 |
| C27 | Boden-Kieseritzky Gambit, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Nf3 |
| C27 | Monster Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7 |
| C27 | Alekhine Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7 6.Nf3 Nc6 7.Nxe5 |
| C27 | Adams Gambit, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.d4 |
| C27 | Frankenstein-Dracula Var, Vienna | 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 |
| C29 | Vienna Gambit, Vienna; C29 | 1.e4 e5 2.Nc3 Nf6 3.f4 |
| C29 | Steinitz Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.d3 |
| C26 | Oxford Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3 |
| C29 | Wurzburger Trap, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3 Qh4 6.g3 Nxg3 7.Nf3 Qh5 8.Nd5 Bxd5 9.Nf4 |
| C29 | Breyer Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Be7 |
| C29 | Kaufmann Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Bg4 6.Qe2 |
| C29 | Paulsen Attack, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3 |
| C29 | Bardeleben Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3 f5 |
| C26 | Mieses Variation, Vienna | 1.e4 e5 2.Nc3 Nf6 3.g3 |
| C25 | Polluck Gambit, Vienna | 1.e4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 Nc6 5.Nge2 d5 6.exd5 |
| C25 | Erben Gambit, Vienna | 1.e4 e5 2.Nc3 Nf6 3.g3 d5 4.exd5 c6 |
| C20 | Alapin Opening | 1.e4 e5 2.Ne2 |
| C40 | King's Knight Opening; C40 | 1.e4 e5 2.Nf3 |
| C40 | Glatz Gambit; Busch-Gass Gambit | 1.e4 e5 2.Nf3 Bc5 |
| C25 | Hamppe Meitner, Vienna | 1.e4 e5 2.Nf3 Bc5 3.Na4 |
| C40 | Chiodini Gambit | 1.e4 e5 2.Nf3 Bc5 3.Nxe5 Nc6 |
| C40 | Jalalabad Defense | 1.e4 e5 2.Nf3 c5 |
| C40 | Gunderam Gambit | 1.e4 e5 2.Nf3 c6 |
| C40 | Queen's Pawn Counter-Gambit; Elephant Gambit | 1.e4 e5 2.Nf3 d5 |
| C40 | Maroczy; Elephant Gambit | 1.e4 e5 2.Nf3 d5 3.exd5 Bd6 |
| C40 | Halasz-Jacobsen Gambit | 1.e4 e5 2.Nf3 d5 3.exd5 Bd6 |
| C40 | Maroczy Gambit | 1.e4 e5 2.Nf3 d5 3.exd5 Bd6 |
| C40 | Paulsen Counter-Gambit | 1.e4 e5 2.Nf3 d5 3.exd5 e4 |
| C40 | Wasp Variation | 1.e4 e5 2.Nf3 d5 3.Nxe5 dxe4 4.Bc4 Qg5 |
| C41 | Philidor Defense; C41 | 1.e4 e5 2.Nf3 d6 |
| C41 | Lopez Counter-Gambit, Philidor | 1.e4 e5 2.Nf3 d6 3.Bc4 f5 |
| C41 | Philidor Gambit | 1.e4 e5 2.Nf3 d6 3.d4 Bd7 |
| C41 | Alapin-Blackburne Gambit, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Bg4 4.dxe5 Nd7 |
| C41 | Exchange Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 exd4 |
| C41 | Morphy Gambit, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Bc4 |
| C41 | Bird Gambit, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.c3 |
| C41 | Paulsen Attack, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 d5 5.exd5 |
| C41 | Larsen Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 g6 |
| C41 | Boden Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Qxd4 Bd7 |
| C41 | Philidor Counter Attack | 1.e4 e5 2.Nf3 d6 3.d4 f5 |
| C41 | Zukertort Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 f5 4.Nc3 |
| C41 | Hanham; Lord Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 |
| C41 | Delmar Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.c3 |
| C41 | Schlechter Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.Nc3 |
| C41 | Krause Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O |
| C41 | Steiner Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O Be7 6.dxe5 |
| C41 | Sharp Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 Nb6 |
| C41 | Lion Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Nc3 Nf6 |
| C41 | Jaenisch Counter-Attack, Philidor; Nimzovich Variation | 1.e4 e5 2.Nf3 d6 3.d4 Nf6 |
| C41 | Klein Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Bc4 |
| C41 | Sokolsky Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Nbd2 |
| C41 | Rellstab Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Qd5 |
| C41 | Larobok Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7 |
| C41 | Locock Variation, Philidor | 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Ng5 h6 5.Nxf7 |
| C40 | Latvian; Greco Counter-Gambit | 1.e4 e5 2.Nf3 f5 |
| C40 | Senechaud Gambit, Latvian | 1.e4 e5 2.Nf3 f5 3.b4 |
| C40 | Mayet Attack, Latvian | 1.e4 e5 2.Nf3 f5 3.Bc4 |
| C40 | Strautins Gambit, Latvian | 1.e4 e5 2.Nf3 f5 3.Bc4 b5 |
| C40 | Polerio-Svedenborg Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 d5 |
| C40 | Poisoned Pawn Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2 |
| C40 | Duke of Courland Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2 6.Qh5 g6 7.Bf7 Kd8 9.Bg6 Qh1 |
| C40 | Morgado Defense, Latvian | 1.e4 e5 2.Nf3 f5 3.Bc4 Nf6 |
| C40 | Diepstraten Countergambit, Latvian | 1.e4 e5 2.Nf3 f5 3.c4 |
| C40 | Clam Gambit, Latvian | 1.e4 e5 2.Nf3 f5 3.d3 Nc6 4.exf5 |
| C40 | Mason Countergambit, Latvian | 1.e4 e5 2.Nf3 f5 3.d4 |
| C40 | Latvian Gambit Accepted | 1.e4 e5 2.Nf3 f5 3.exf5 |
| C40 | Lobster Gambit, Latvian | 1.e4 e5 2.Nf3 f5 3.g4 |
| C40 | Mlotkowski Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Nc3 |
| C40 | Fraser Defense, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Nc6 |
| C40 | Corkscrew Counter-Gambit, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Nf6 4.Bc4 fxe4 5.Nf7 Qe7 8.Nxh8 d5 |
| C40 | Greco Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qe7 |
| C40 | Mail Line, Latvian Gambit Accepted | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 |
| C40 | Bilguer Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 |
| C40 | Bronstein Attack, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Be2 |
| C40 | Nimzovich Attack, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Ne3 |
| C40 | Bronstein Gambit, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Qh5+ g6 7.Qe2 |
| C40 | Foltys-Leonhardt Variation, Latvian Gambit | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 |
| C40 | Foltys Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.d3 |
| C40 | Leonhardt Variation, Latvian | 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.Nc3 |
| C40 | Damiano Defense | 1.e4 e5 2.Nf3 f6 |
| C40 | Damiano Gambit | 1.e4 e5 2.Nf3 f6 3.Nxe5 fxe5 4.Qh5+ g6 5.Qxe5+ Qe7 6.Qxh8 |
| C40 | Chigorin Gambit, Damiano | 1.e4 e5 2.Nf3 f6 3.Nxe5 Qe7 4.Nf3 d5 |
| C44 | C44 | 1.e4 e5 2.Nf3 Nc6 |
| C44 | Paschman Wing Gambit | 1.e4 e5 2.Nf3 Nc6 3.b4 |
| C60 | Ruy Lopez; Spanish Opening; C60 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 |
| C60 | Bulgarian Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a5 |
| C68 | Morphy Defense, Ruy Lopez; C68 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 |
| C70 | Morphy Defense, Ruy Lopez; C70 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 |
| C70 | Caro Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 |
| C70 | Graz Variation, Ruy | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Bc5 |
| C70 | Furman-Taimanov; Wing Var, Ruy; Norwegian Variation | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5 |
| C70 | Nightingale Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5 6.Bxf7+ |
| C70 | Alapin's Defense Deferred, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bb4 |
| C70 | Classical Defense Deferred, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bc5 |
| C71 | Steinitz Defense Deferred; Ruy Lopez; C71 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 |
| C71 | Modern Steinitz Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 |
| C73 | C73 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 |
| C73 | Richter Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4 |
| C73 | Alapin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4 f6 |
| C74 | C74 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 |
| C75 | C75 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 |
| C76 | C76 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 6.d4 g6 |
| C74 | Siesta Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5 |
| C74 | Kopaiev Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5 6.exf5 Bxf5 7.O-O |
| C71 | Keres Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c4 |
| C71 | Noah's Ark Trap, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.d4 b5 6.Bb3 exd4 7.Nxd4 Nxd4 8.Qxd4 c5 9.Qd5 Be6 10.Qc6+ Bd7 |
| C72 | C72 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O-O |
| C70 | Schliemann Defense Deferred, Ruy | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5 |
| C70 | Jaenisch Gambit Deferred, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5 5.exf5 |
| C77 | C77 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 |
| C77 | Treybel; Flohr; Exchange Var Deferred | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6 |
| C77 | Bayreuth Variation, ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6 |
| C77 | Jaffe Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.c3 |
| C77 | Anderssen Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 |
| C77 | Duras Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 d6 6.c4 |
| C77 | Mackenzie Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 |
| C77 | Center Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4 |
| C77 | Nimzovich; Tarrasch Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Nc3 |
| C78 | Normal Variation, Ruy Lopez; C78 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O |
| C78 | Arkangelsk; Counterthrust Var, Ruy | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 |
| C78 | Shannon Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Ng5 d5 |
| C78 | Wing Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.a4 |
| C78 | Neo-Steinitz Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 d6 |
| C78 | Moeller Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5 |
| C84 | Closed Defense, Ruy Lopez; C84 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 |
| C85 | Delayed Exchange Ruy Lopez Deferred; C85 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6 |
| C84 | Center Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4 |
| C84 | Basque Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4 exd4 7.e5 Ne4 8.c3 |
| C84 | Lopez Four Knights, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Nc3 |
| C86 | Worrall Attack, Ruy Lopez; C86 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 |
| C86 | Schlechter Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d5 |
| C86 | English Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d6 9.d4 Bg4 |
| C87 | C87 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 |
| C88 | C88 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 |
| C88 | Trajkovic Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7 |
| C88 | Pseudo-Marshall Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 |
| C90 | C90 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 |
| C90 | Balla Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 Na5 9.Bc2 c5 10.d4 Qc7 |
| C90 | Suetin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.a3 |
| C90 | Lutikov Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.Bc2 |
| C90 | Pilnik Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d3 |
| C91 | Yates Variation, Ruy; C91 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4 |
| C91 | Bogoljubow; Counterthrust Var, Ruy | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4 Bg4 |
| C92 | C92 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 |
| C92 | Keres Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 a5 |
| C92 | Flohr; Zaitsev; Lenzerheide Var, Ruy | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Bb7 |
| C92 | Kholmov Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Be6 |
| C93 | Smyslov Variation, Ruy Lopez; C93 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 h6 |
| C96 | C96 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 |
| C96 | Borisenko Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Nc6 |
| C96 | Keres Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Nd7 |
| C97 | Chigorin Variation, Ruy Lopez; C97 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 |
| C92 | Spanish Benoni, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.d5 |
| C97 | Classical Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 |
| C99 | C99 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4 |
| C98 | C98 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 |
| C98 | Rauzer Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 13.dxe5 dxe5 14.a4 |
| C94 | Breyer; Retreat Variation, Ruy Lopez; C94 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 |
| C95 | C95 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 |
| C95 | Borisenko Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 |
| C95 | Arseniev Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.c4 |
| C95 | Romanishin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nbd2 Bb7 12.Bc2 Re8 13.Nf1 Bf8 14.Bg5 |
| C95 | Simagin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nh4 |
| C92 | Keres Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nd7 |
| C92 | Zaitsev System, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Re8 |
| C88 | Rosen Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.d4 |
| C88 | Anti-Marshall Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4 |
| C89 | C89 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 |
| C89 | Marshall Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 |
| C89 | Marshall Counter-Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.d4 |
| C89 | Steiner Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 e4 |
| C89 | Kevitz Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.Bxd5 cxd5 13.d4 Bd6 14.Re3 |
| C89 | Geller Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 |
| C89 | Fischer Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.g3 |
| C90 | Suetin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.a3 |
| C90 | Lutikov Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.Bd2 |
| C90 | Leonhardt Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 Na5 9.Bc2 c5 10.d4 Qc7 11.h3 Nc6 12.d5 Nd8 13.Nbd2 g5 |
| C87 | Averbakh Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 |
| C87 | Kecskemet; Timbuktu Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 Be8 |
| C87 | Romanovsky Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 exd4 10.cxd4 Nb4 |
| C79 | Central Countergambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d5 |
| C79 | Russian Defense, Ruy Lopez; C79; Lasker Defense | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6 |
| C79 | Brix Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O g6 |
| C80 | Tarrasch; Open Variation, Ruy Lopez; C80 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 |
| C80 | Schlechter Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.a4 Nxd4 |
| C80 | Berger Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.a4 Nxd4 9.Nxd4 exd4 10.Nc3 |
| C80 | Harksen Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.c4 |
| C83 | Malkin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 |
| C81 | Keres; Estonian; Howell; Moscow Var | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 |
| C82 | C82 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 |
| C82 | Italian Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 |
| C82 | St Petersburg Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2 |
| C82 | Dilworth; Kleczynski Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2 O-O 11.Bc2 |
| C82 | Motzko Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Qd3 |
| C82 | Nenarokov Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Qd3 Ne7 |
| C83 | C83 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7 |
| C83 | Breslau Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7 10.Re1 O-O 11.Nd4 |
| C82 | Berlin Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Nc5 |
| C80 | Bernstein Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 |
| C80 | Karpov Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4 |
| C81 | Howell Attack, Ruy Lopez; C81 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2 |
| C81 | Adam Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2 Be7 10.c4 |
| C81 | Ekstrom Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2 Be7 10.Rd1 O-O 11.c4 |
| C80 | Zukertort Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Ne7 |
| C80 | Richter Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.d5 |
| C80 | Friess Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Nxe5 |
| C80 | Riga Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 exd4 |
| C80 | Knoore Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Nc3 |
| C80 | Tartakower Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Qe2 |
| C80 | Skipworth Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Re1 d5 |
| C77 | Wormald Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2 |
| C70 | Cozio Defense Deferred, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nge7 |
| C68 | Exchange Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 |
| C68 | Lutikov Variation, Ruy Lopez Exchange | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 |
| C68 | Keres Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3 |
| C68 | Romanovsky Variation, Ruy Lopez Exchange | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3 f6 6.d3 |
| C68 | Alekhjne Variation, Ruy Lopez Exchange | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4 Bd6 |
| C68 | Barendregt-Fischer Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O |
| C68 | King's Bishop Variation, Ruy Lopez Exchange | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bd6 |
| C68 | Alapin Gambit, Ruy Lopez Exchange | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5 |
| C69 | Gligoric Variation, Ruy Lopez; C69 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 |
| C69 | Bronstein Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Qd6 |
| C60 | Rotary-Albany Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 b6 |
| C60 | Alapin Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4 |
| C60 | Alapin Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4 4.c3 Ba5 5.Bxc6 dxc6 |
| C64 | Classical; Cordel Var, Ruy Lopez; C64 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 |
| C64 | Spanish Wing Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.b4 |
| C64 | Charousek Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Bb6 |
| C64 | Konikowski Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 d5 |
| C64 | Cordel Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 f5 |
| C64 | Benelux Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Nf6 5.d4 Bb6 6.O-O O-O |
| C64 | Boden Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Qe7 |
| C64 | Zaitsev Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nd4 5.b4 |
| C64 | Zukertort Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nf6 5.c3 |
| C60 | Lucena Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Be7 |
| C60 | Sawyer's Gambit, Ruy Lopez; Spanish Countergambit | 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 |
| C60 | Harding Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.Nxc6 |
| C60 | Fricke Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.O-O |
| C62 | Steinitz Defense, Ruy Lopez; C62 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 |
| C62 | Nimzovich Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 Bd7 4.Nc3 Nf6 5.Bxc6 |
| C62 | Center Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 exd4 5.O-O |
| C63 | Schliemann; Jaenisch Var, Ruy Lopez; C63 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 |
| C63 | Exchange Variation, Schliemann Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Bxc6 |
| C63 | Schoenemann Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d4 |
| C63 | Jaenisch Gambit Accepted, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.exf5 |
| C63 | Berger (Dyckhoff) Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 |
| C63 | Kostic Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Be7 |
| C63 | Moehring Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qd5 |
| C63 | Tartakower Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Nf6 |
| C63 | Soviet Youth Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.O-O |
| C63 | Kostic Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nf6 5.exf5 Bc5 |
| C60 | Nuremberg Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 f6 |
| C60 | Brentano Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 g5 |
| C60 | Barnes; Smyslov; Fianchetto Var, Ruy | 1.e4 e5 2.Nf3 Nc6 3.Bb5 g6 |
| C60 | Retreat Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nc8 |
| C61 | Bird Defense, Ruy Lopez; C61 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 |
| C61 | Paulsen Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 4.Nxd4 exd4 5.O-O Ne7 |
| C65 | Berlin Defense, Ruy Lopez; C65 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 |
| C65 | Kaufmann Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Bc5 5.Be3 |
| C65 | Anderssen Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.Bxc6+ |
| C65 | Duras Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.c4 |
| C65 | Mortimer Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7 |
| C65 | Mortimer Trap, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7 5.Nxe5 c6 |
| C65 | Nyholm Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d4 exd4 5.O-O |
| C65 | Beverwijk Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Bc5 |
| C66 | Improved Steinitz Defense, Ruy Lopez; C66 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 |
| C66 | Hedgehog Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 |
| C66 | Closed Bernstein Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bg5 |
| C66 | Closed Showalter Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bxc6 |
| C66 | Tarrasch Trap, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Re1 O-O |
| C66 | Closed Wolf Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 exd4 |
| C66 | Fishing Pole Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Ng4 |
| C67 | Rio Gambit Accepted, Ruy Lopez; C67 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 |
| C67 | Rosenthal Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 a6 |
| C67 | Rio de Janeiro Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 |
| C67 | Minckwitz Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.dxe5 |
| C67 | Trifunovic Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 d5 |
| C67 | Pillsbury Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.b3 |
| C67 | Zukertort Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.c4 |
| C67 | Berlin; Rio de Janerio Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.Nc3 O-O 10.Re1 |
| C67 | Winawer Attack, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.Nd4 O-O |
| C67 | Cordel Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nf5 |
| C67 | L'Hermet Variation, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6 |
| C67 | Westerinen Line, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Ne4 |
| C60 | Cozio Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 |
| C60 | Tartakower Gambit, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.d4 exd4 5.Nxd4 g6 6.Nc3 Bg7 7.Be3 O-O 8.Qd2 d5 |
| C60 | Paulsen Variation, Cozio Defense, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6 |
| C60 | Vinogradov Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qe7 |
| C60 | Frankfort; Gunderam Var, Ruy Lopez | 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qf6 |
| C50 | Italian Game; C50 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 |
| C50 | Giuoco Piano; Italian Opening | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 |
| C51 | Evans Gambit; C51 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 |
| C51 | Lange Variation, Evans Gambit | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bb6 5.b5 Na5 6.Nxe5 Nh6 |
| C51 | Evans Gambit Accepted | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 |
| C52 | Main Line, Evans Gambit; C52 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 |
| C52 | Leonhardt Variation, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 b5 |
| C52 | Sokolsky Variation, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Bg5 |
| C52 | Lasker Defense, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.O-O Bb6 |
| C52 | Tartakower Attack, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Qb3 |
| C52 | Pierce Defense, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 |
| C52 | Schulen Defense, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O b5 |
| C52 | Waller Attack, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O d6 8.Qb3 |
| C52 | Compromised Defense, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O dxc3 |
| C52 | Mieses Defense, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O Nge7 |
| C52 | Slow Variation, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O |
| C52 | Richardson Attack, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O Nf6 7.d4 O-O 8.Nxe5 |
| C51 | Normal Position, Evans Gambit | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 |
| C51 | Ulvestad Variation, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.d5 Na5 10.Bb2 |
| C51 | Paulsen Variation, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.d5 Na5 10.Bb2 Ne7 |
| C51 | Morphy Attack, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3 |
| C51 | Fraser Attack; Mortimer, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3 Bg4 10.Qa4 |
| C51 | Goering Attack, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3 Na5 10.Bg5 |
| C51 | Stone-Ware Defense, Evans Gambit | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bd6 |
| C51 | Anderssen Variation, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7 |
| C51 | Cordel Line, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7 6.d4 Na5 |
| C51 | Hein Countergambit, Evans | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 d5 |
| C50 | Jerome Gambit; Kentucky Opening | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ |
| C53 | Classical Variation, Italian; C53 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 |
| C53 | Labourdonnais Variation, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 d6 5.d4 exd4 6.cxd4 Bb6 |
| C53 | Alexandre Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 f5 |
| C54 | C54 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 |
| C54 | Bird Attack, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.b4 |
| C53 | Giuoco Pianissimo | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3 |
| C53 | Center Attack, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 |
| C53 | Grevo Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 |
| C54 | Cracow Variation, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Kf1 |
| C54 | Moeller (Therkatz) Attack, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 |
| C54 | Therkatz-Herzog, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 Bf6 10.Re1 Ne7 |
| C54 | Greco Variation, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Nxc3 |
| C54 | Mason Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.O-O |
| C53 | Albin Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.O-O |
| C53 | Lewis Defense, Italian; Closed Variation | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 |
| C53 | Center Holding Variation, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 |
| C53 | Mestel Variation, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 6.Bg5 |
| C50 | Giuoco Pianissimo | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 |
| C50 | Lucchini Gambit; Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 f5 |
| C50 | Italian Four Knights Variation | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 |
| C50 | Canal Variation, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 d6 6.Bg5 |
| C50 | Rosentreter Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d4 |
| C50 | Italian Variation, Four Knights Game | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Nc3 Nf6 |
| C50 | Deutz Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.O-O Nf6 5.d4 |
| C50 | Hungarian Defense | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 |
| C50 | Tartakower Variation, Hungarian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 4.d4 exd4 5.c3 Nf6 6.e4 Ne4 |
| C50 | Half Giuoco Piano; Semi-Italian Opening | 1.e4 e5 2.Nf3 Nc6 3.Bc4 d6 |
| C50 | Rousseau Gambit | 1.e4 e5 2.Nf3 Nc6 3.Bc4 f5 |
| C50 | Shilling (Kostic) Gambit, Italian | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4 |
| C55 | Two Knights Defense; C55 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 |
| C55 | De Riviere Gambit | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.c3 |
| C55 | Modern Bishop's Opening | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 |
| C56 | Open Variation, Two Knights Defense; C56 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 |
| C56 | Perreux Variation, Two Knights Defense | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.Ng5 |
| C56 | Scotch Gambit | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O |
| C56 | Max Lange Attack | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 |
| C56 | Loman Defense, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be6 9.Ng5 g6 |
| C56 | Marshall Variation, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be7 9.Ng5 Qd5 10.Nc3 Qf5 |
| C56 | Double Gambit Accepted, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 |
| C56 | Nachmanson Gambit, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Nc3 |
| C56 | Jordansky Attack, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Ne4 Be6 10.Bg5 |
| C57 | Prussian Game; Knight Attack, Two Knights; C57 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 |
| C57 | Traxler; Wilkes-Barre Var, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 |
| C57 | Trencianske-Teplice Gambit, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.Bxf7+ Ke7 6.d4 |
| C57 | Ulvestad Variation, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 |
| C57 | Kurkin Gambit, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1 h6 7.Nxf7 |
| C58 | Polerio Defense, Two Knights; C58 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 |
| C59 | C59 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 |
| C59 | Suhle Defense, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6 |
| C59 | Goering Variation, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6 9.Nf3 e4 10.Ne5 |
| C58 | Bogoljubow Variation, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3 |
| C58 | Colman Variation, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3 Rb8 |
| C58 | Kieseritzky; Morphy Var, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 |
| C58 | Yankovich Variation, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.Qe2 Nxc4 9.dxc4 Bc5 10.Nfd2 |
| C57 | Kloss Gambit, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nb4 |
| C57 | Fritz Variation, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4 |
| C57 | Berliner Variation, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4 6.c3 b5 7.Bf1 Nxd5 8.Ne4 Qh4 |
| C57 | Lolli Attack, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4 |
| C57 | Fried Liver; Fegatello Attack, 2 Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.Nxf7 |
| C57 | Ponziani-Steintz Gambit, Two Knights | 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Nxe4 |
| C44 | Taylor Opening; Inverted Hungarian | 1.e4 e5 2.Nf3 Nc6 3.Be2 |
| C44 | Inverted Hanham Opening | 1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d3 d5 5.Nbd2 |
| C44 | Basman Gambit | 1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d4 exd4 5.e5 |
| C44 | Ponziani; Staunton; English Knights | 1.e4 e5 2.Nf3 Nc6 3.c3 |
| C44 | Spanish Variation, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5 |
| C44 | Nikitin Gambit, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5 dxe4 5.Nxe5 Qd5 6.Qa4 |
| C44 | Caro Variation, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Bd7 |
| C44 | Steinitz Variation, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 f6 |
| C44 | Leonhardt Variation, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Nf6 |
| C44 | Ponziani Counter-Gambit | 1.e4 e5 2.Nf3 Nc6 3.c3 f5 |
| C44 | Schmidt Attack, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 f5 4.d4 d6 5.d5 |
| C44 | Jaenisch Counterattack, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 |
| C44 | Neumann Gambit, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.Bc4 |
| C44 | Breyer Opening, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d3 Be7 5.b4 |
| C44 | Vukovic Gambit, Ponziani | 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d4 Nxe4 5.d5 Bc5 |
| C44 | Dresden Opening | 1.e4 e5 2.Nf3 Nc6 3.c4 |
| C44 | Scotch Game | 1.e4 e5 2.Nf3 Nc6 3.d4 |
| C44 | MacLopez; Relfsson Gambit, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bb5 |
| C44 | Scotch Gambit | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 |
| C44 | London Defense, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bb4+ |
| C44 | Vitzhum Attack, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Nh6 6.Qh5 |
| C44 | Paulsen; Anderssen C-A, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.O-O d6 6.c3 Bg4 |
| C44 | Benima Defense, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Be7 |
| C44 | Goering Gambit, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 |
| C44 | Goering Gambit Declined, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5 |
| C44 | Double Pawn Sacrifice, Goering Gambit | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Bc4 |
| C44 | Bardeleben Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 Bb4 6.Bc4 Nf6 |
| C45 | C45 | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 |
| C45 | Malaniuk Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bb4+ |
| C45 | Classical Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 |
| C45` | Paulsen Attack, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 |
| C45 | Gunsberg Defense, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 Nd8 |
| C45 | Fleissig; Meitner Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Nc2 |
| C45 | Blackburne Attack, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Qd2 |
| C45 | Millennium Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Qg6 |
| C45 | Blumenfeld Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.Nb5 |
| C45 | Potter Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 |
| C45 | Romanishin Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb4+ |
| C45 | Geller Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb6 6.a4 a6 7.Nc3 Nf6 |
| C45 | Intermezzo Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nxc6 Qf6 |
| C45 | Alekhine Gambit, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.e5 |
| C45 | Schmidt Var; Scotch Four Knights | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3 |
| C45 | Mieses Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 |
| C45 | Tartakower Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.Nd2 |
| C45 | Steinitz; Pulling Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 |
| C45 | Braune Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Be3 |
| C45 | Horwitz Attack, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nb5 |
| C45 | Steinitz Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3 |
| C45 | Modern Defesne, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3 Bb4 |
| C45 | Fraser Attack, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf3 |
| C45 | Paulsen Variation, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf5 |
| C44 | Lolli Attack, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4 |
| C44 | Napoleon Gambit, Scotch | 1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4 4.Nxd4 exd4 5.Bc4 |
| C44 | Konstantinopolsky Opening | 1.e4 e5 2.Nf3 Nc6 3.g3 |
| C46 | Three Knights Opening; C46 | 1.e4 e5 2.Nf3 Nc6 3.Nc3 |
| C46 | Schlechter Variation, Three Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Bb4 4.Nd5 Nf6 |
| C46 | Winawer Defense, Three Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 f5 |
| C46 | Steinitz Defense, Three Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 g6 |
| C46 | Rosenthal Variation, Three Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 g6 4.d4 exd4 5.Nd5 |
| C47 | Four Knights Openng; C47 | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 |
| C47 | Gunsberg Variation, Four Kngiths | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3 |
| C47 | Provincial Opening, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3 d6 5.h3 |
| C48 | Spanish Four Knights Game; C48 | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 |
| C48 | Ranken Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 a6 5.Bxc6 |
| C49 | Double Ruy Lopez Opening, 4 Knights; C49 | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 |
| C49 | Paulsen Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Bxc6 |
| C49 | Svenonius Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d5 |
| C49 | Janowski Variation, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d6 8.Re1 |
| C49 | Symmetrical Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 |
| C49 | Bernstein Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Ne7 |
| C49 | Metger Unpin Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 |
| C49 | Pillsbury Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Ne7 |
| C49 | Maroczy Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Ne2 |
| C49 | Blackburne Attack, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Nd5 Bc5 7.d4 |
| C48 | Classical Variation, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 |
| C48 | Marshall Gambit, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 5.Nxe5 Nd4 6.Ba4 O-O |
| C48 | Rubinstein Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4 |
| C46 | Italian Variation, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 |
| C47 | Noa Gambit, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Nxe4 5.Bxf7+ |
| C47 | Bogoljubow (Scotch) Variation, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 |
| C47 | Oxford Gambit, Four Kngihts | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.d5 Nd4 |
| C47 | Krause Gambit, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5 |
| C47 | Leonhardt Defense, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5 Qe7 |
| C47 | Belgrade Gambit, 4 Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nd5 |
| C47 | Schmid Gambit, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Nxe4 |
| C46 | Halloween Gambit, Four Knights | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Nxe5 |
| C44 | Chicago; Irish; Schulze-Muller Gambit | 1.e4 e5 2.Nf3 Nc6 3.Nxe5 Nxe5 4.d4 |
| C42 | Petroff Defense; Russian Defense; C42 | 1.e4 e5 2.Nf3 Nf6 |
| C42 | Urosov Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Bc4 |
| C42 | Boden-Kieseritzky Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3 |
| C42 | Lichtenhein Defense, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3 d5 |
| C43 | Modern Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 |
| C43 | Symmetrical Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 d5 |
| C43 | Suchting Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.Bc4 |
| C43 | Tal Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Bb5 |
| C43 | Center Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Qxd4 |
| C43 | Trifunovic Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Bxe5 |
| C43 | Murret Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 Nc6 |
| C42 | Russian Three Knights Var, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nc3 |
| C43 | Steinitz Variation, Petoff; C43 | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4 |
| C43 | Urusov Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4 exd4 4.Bc4 |
| C42 | Paulsen Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nc4 |
| C42 | Karklins-Martinovsky Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nd3 |
| C42 | Millenium Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Bd3 |
| C42 | Kaufmann Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.c4 |
| C42 | French Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d3 |
| C42 | Classical Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 |
| C42 | Marshall Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 |
| C42 | Tarrasch Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 Bg4 |
| C42 | Staunton Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 c6 |
| C42 | Jaenisch Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4 |
| C42 | Browne Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4 Nb4 9.cxd5 |
| C42 | Chigorin Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 |
| C42 | Berger Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 Bg4 9.c3 f5 10.Nbd2 |
| C42 | Mason Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O O-O |
| C42 | Mason-Showalter Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6 |
| C42 | Nimzovich Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3 |
| C42 | Lasker Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2 |
| C42 | Cozio (Lasker) Attack, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2 |
| C42 | Cochrane Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7 |
| C42 | Stafford Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nc6 |
| C42 | Damiano Variation, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4 |
| C42 | Kholmov Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4 4.Qe2 Qe7 |
| C42 | Moody Gambit, Petroff | 1.e4 e5 2.Nf3 Nf6 3.Qe2 Nc6 4.d4 |
| C40 | Levenstein; Queen's Defense; Brazilian; Gunderam | 1.e4 e5 2.Nf3 Qe7 |
| C40 | Gunderam Gambit | 1.e4 e5 2.Nf3 Qe7 3.Bc4 f5 |
| C40 | McConnell Defense | 1.e4 e5 2.Nf3 Qf6 |
| C40 | Greco Defense | 1.e4 e5 2.Nf3 Qf6 |
| C40 | Labourdonnais Gambit | 1.e4 e5 2.Nf3 Qf6 3.Bc4 Qg6 4.O-O |
| C20 | Napoleon Attack | 1.e4 e5 2.Qf3 |
| C20 | Wayward Queen; Danvers; Parnham | 1.e4 e5 2.Qh5 |
| C20 | Mellon Gambit | 1.e4 e5 2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d5 |
| C20 | Kiddie Countergambit | 1.e4 e5 2.Qh5 Nf6 |
| C00 | French Defense; C00 | 1.e4 e6 |
| C00 | Reti (Horwitz) Variation, French | 1.e4 e6 2.b3 |
| C00 | Papa-Ticulat Gambit, French | 1.e4 e6 2.b3 d5 3.Bb2 |
| C00 | Banzai-Leong Gambit, French | 1.e4 e6 2.b4 |
| C00 | Pinova Gambit | 1.e4 e6 2.b4 Bxb4 3.e5 |
| C00 | Bird Invitation, French | 1.e4 e6 2.Bb5 |
| C00 | Orthoschapp Variation, French | 1.e4 e6 2.c4 d5 3.cxd5 exd5 4.Qb3 |
| C00 | King"s Indian Attack | 1.e4 e6 2.d3 |
| C00 | Reversed Philidor, French | 1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 Nc6 5.Be2 |
| C00 | Franco-Hiva Gambit, French | 1.e4 e6 2.d3 f5 |
| C01 | C01 | 1.e4 e6 2.d4 |
| C01 | Baeuerle Gambit, French | 1.e4 e6 2.d4 b5 |
| C01 | Schlechter Variation, French | 1.e4 e6 2.d4 d5 3.Bd3 |
| C00 | Alapin; Witaker Gambit, French | 1.e4 e6 2.d4 d5 3.Be3 |
| C00 | Alapin-Diemer Gambit, French | 1.e4 e6 2.d4 d5 3.Be3 dxe4 4.f3 |
| C00 | Diemer-Duhm Gambit, French | 1.e4 e6 2.d4 d5 3.c4 |
| C02 | Advance Variation, French; C02 | 1.e4 e6 2.d4 d5 3.e5 |
| C02 | Extended Bishop Swap, French | 1.e4 e6 2.d4 d5 3.e5 Bd7 |
| C02 | Advance; Nimzovich; Steinitz Var, Fr | 1.e4 e6 2.d4 d5 3.e5 Bd7 |
| C02 | Frenkel Gambit, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.b4 |
| C02 | Paulsen Attack, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 |
| C02 | Euwe Variation, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Bd7 |
| C02 | Lputian Variation, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 Nh6 |
| C02 | Milner-Barry Gambit, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 |
| C02 | Milner-Barry Gambit, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd3 7.cxd3 Bd7 8.O-O Nxd4 9.Nxd4 |
| C02 | Wade Variation, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7 |
| C02 | Nimzovich Variation, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 |
| C02 | Ruisdonk Gambit, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Bd3 |
| C02 | Nimzovich Attack, French | 1.e4 e6 2.d4 d5 3.e5 c5 4.Qg4 |
| C01 | Exchange Variation, French | 1.e4 e6 2.d4 d5 3.exd5 exd5 |
| C01 | Monte Carlo Variation, French | 1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4 |
| C01 | Svenius Variation, French | 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5 |
| C10 | Normal Variation, French; C10 | 1.e4 e6 2.d4 d5 3.Nc3 |
| C15 | Winawer Variation, French; C15 | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 |
| C15 | Winckelmann-Riemer Gambit, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.a3 |
| C15 | Fingerslip Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 |
| C15 | Kunin Double Gambit, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 dxe4 5.Qg4 Qxd4 |
| C15 | Schwarz's Line, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 Ne7 5.Nb1 |
| C15 | Kondratiyev Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd3 c5 5.exd5 Qxd5 6.Bd2 |
| C16 | C16 | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 |
| C17 | C17 | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 |
| C18 | C18 | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 |
| C18 | Swiss (Retreat) Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5 |
| C18 | Armenian Line, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5 6.b4 cxd4 |
| C19 | C19 | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 |
| C19 | Poisoned Pawn Variation, French Winawer | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4 |
| C18 | Maroczy-Willis Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 cxd4 6.axb4 dxc3 |
| C17 | Bogoljubow Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 |
| C17 | Icelandic Defense, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.f4 |
| C17 | Moscow Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Qg4 |
| C16 | Petrosian Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Qd7 |
| C15 | Delayed Exchange Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5 |
| C01 | Canal Attack, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5 exd5 5.Bd3 Ne7 6.Qh5 |
| C15 | Alekhine (Maroczy) Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 |
| C15 | Kan Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 dxe4 5.a3 Bxc3+ 6.Nxc3 Nc6 |
| C10 | Marshall Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 c5 |
| C10 | Rubinstein Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 |
| C10 | Fort Knox Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Bd7 5.Nf3 Bc6 |
| C10 | Rasa-Studier Gambit, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Be3 |
| C10 | Ellis Gambit, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 e5 |
| C10 | Blackburne Defense, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 |
| C10 | Capablanca Line, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5 |
| C10 | Frere; Becker; Katilimov, Maric Var, French | 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Qd5 |
| C11 | Classical Variation, French; C11 | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 |
| C11 | Swiss Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bd3 |
| C11 | Henneberger Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Be3 |
| C12 | C12 | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 |
| C12 | McCutcheon Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 |
| C12 | Olland (Dutch) Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bc1 |
| C12 | Lasker Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3 |
| C12 | Duras Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 Kf8 9.Bc1 |
| C12 | Tartakower Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Nfd7 |
| C12 | Janowski Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Be3 |
| C12 | Bernstein Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bh4 |
| C12 | Chigorin Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.exf6 |
| C12 | Grigoriev Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.exf6 hxg5 7.fxg7 Rg8 8.h4 gxh4 9.Qg4 |
| C12 | Wolf Gambit, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.Nge2 |
| C14 | C14 | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 |
| C14 | Anderssen (Richter) Attack, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6 |
| C14 | Tartakower Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ne4 |
| C14 | Classical Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 |
| C14 | Tarrasch Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Bd3 |
| C14 | Steinitz Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4 |
| C14 | Alapin Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Nb5 |
| C14 | Rubinstein Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qd2 |
| C14 | Pollock Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qg4 |
| C14 | Chatard-Alekhine; Albin Attack, Fr | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 |
| C14 | Maroczy Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 a6 |
| C14 | Albin-Chatard Gambit, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 Bxg5 7.hxg5 Qxg5 |
| C14 | Breyer Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 c5 |
| C14 | Teichmann Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 f6 |
| C14 | Spielmann Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 O-O |
| C13 | Vistaneckis (Nimzovich) Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8 |
| C13 | Frankfurt Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8 6.Be3 b6 |
| C11 | Burn Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4 |
| C13 | C13 | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4 |
| C11 | Steinitz Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 |
| C11 | Bradford Attack, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.dxc5 Bxc5 7.Qg4 |
| C11 | Brodsky-Jones Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.dxc5 Nc6 7.a3 Bxc5 8.Qg4 O-O 9.Nf3 f6 |
| C11 | Boleslavsky Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3 |
| C11 | Gledhill Attack, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.Qg4 |
| C10 | Svenonius Variation, French | 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5 |
| C03 | Tarrasch Variation, French; C03 | 1.e4 e6 2.d4 d5 3.Nd2 |
| C03 | Morozevich Variation, French | 1.e4 e6 2.d4 d5 3.Nd2 Be7 |
| C07 | Open System Tarrasch French; C07 | 1.e4 e6 2.d4 d5 3.Nd2 c5 |
| C08 | C08 | 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 |
| C09 | C09 | 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6 |
| C07 | Shaposhnikov Gambit, French | 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Nf6 |
| C07 | Chistiakov Defense, French | 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5 |
| C03 | Haberditz Variation, French | 1.e4 e6 2.d4 d5 3.Nd2 f5 |
| C04 | C04 | 1.e4 e6 2.d4 d5 3.Nd2 Nc6 |
| C06 | Botvinnik Variation, French | 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.e4 Nfd7 5.Bd3 c5 6.c3 b6 |
| C04 | Guimard Variation, French | 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7 |
| C04 | Leningrad Variation, French | 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 cxd4 8.cxd4 |
| C05 | C05 | 1.e4 e6 2.d4 d5 3.Nd2 Nf6 |
| C06 | C06 | 1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 |
| C01 | Perseus Gambit, French | 1.e4 e6 2.d4 d5 3.Nf3 |
| C01 | Carlson Gambit, French | 1.e4 e6 2.d4 d5 3.Nf3 dxe4 4.Ne5 |
| C01 | Morphy Gambit, French | 1.e4 e6 2.d4 d5 3.Nh3 |
| C01 | Hoffman Gambit | 1.e4 e6 2.d4 d5 3.Qe2 e5 4.f4 exf4 |
| C01 | Franco-Hiva Gambit I, French | 1.e4 e6 2.d4 f5 |
| C01 | Mediterranean Defense, French | 1.e4 e6 2.d4 Nf6 |
| C00 | Steinitz Attack, French | 1.e4 e6 2.e5 |
| C00 | Bourdonnais (La Bourdonnais) Variation, French | 1.e4 e6 2.f4 |
| C00 | Reuter Gambit, French | 1.e4 e6 2.f4 d5 3.Nf3 dxe4 4.Ng5 |
| C00 | Reti-Spielmann Attack, French | 1.e4 e6 2.g3 |
| C00 | Queen's Knight, French | 1.e4 e6 2.Nc3 |
| C00 | Pelikan Variation, French | 1.e4 e6 2.Nc3 d5 3.f4 |
| C00 | Two Knight Variation, French | 1.e4 e6 2.Nc3 d5 3.Nf3 |
| C00 | Knight Variation, French | 1.e4 e6 2.Nf3 |
| C00 | Wing Gambit, French | 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 |
| C00 | Two Knights Variation, French | 1.e4 e6 2.Nf3 d5 3.Nc3 |
| C00 | Chigorin Variation, French | 1.e4 e6 2.Qe2 |
| B00 | Mao Tse Tung; Duras | 1.e4 f5 |
| B00 | Fred; From Reversed | 1.e4 f5 |
| B00 | Tiers Counter-Gambit | 1.e4 f5 |
| B00 | Barnes Defense | 1.e4 f6 |
| B00 | Basman Defense; Macho Grob | 1.e4 g5 |
| B00 | Basman; Macho Grob; Borg | 1.e4 g5 |
| B00 | Borg Gambit | 1.e4 g5 2.d4 Bg7 |
| B00 | Zilbermints Gambit, Borg | 1.e4 g5 2.d4 e5 |
| B00 | Borg Defense; Troon Gambit | 1.e4 g5 2.d4 h6 3.h4 g4 |
| B06 | Pirc; Robatsch; Modern; King Pawn Fianchetto; B06 | 1.e4 g6 |
| B06 | Monkey's Bum, Pirc | 1.e4 g6 2.Bc4 Bg7 3.Qf3 e6 4.d4 |
| B06 | Bishop Attack | 1.e4 g6 2.d4 Bg7 3.Bc4 |
| B06 | Buecker Gambit | 1.e4 g6 2.d4 Bg7 3.Bc4 b5 |
| B06 | Westermann Gambit | 1.e4 g6 2.d4 Bg7 3.Bd2 |
| B06 | Wind Gambit | 1.e4 g6 2.d4 Bg7 3.Bd3 |
| A40 | Polish Variation | 1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nf3 Qb6 |
| A40 | Dunworth Variation, Modern Defense | 1.e4 g6 2.d4 Bg7 3.c4 d5 4.exd5 c6 5.dxc6 Bxd4 |
| B06 | Three Pawns Attack | 1.e4 g6 2.d4 Bg7 3.f4 |
| B06 | Pterodactyl, Pirc | 1.e4 g6 2.d4 Bg7 3.Nc3 c5 |
| B06 | Gurgenidze Defense, Modern Defense | 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5 |
| B06 | Mittenberger Gambit, Modern Defense | 1.e4 g6 2.d4 Bg7 3.Nc3 d5 |
| B06 | Anti-Modern | 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qe2 |
| B06 | Pseudo-Austrian Attack | 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 |
| B06 | Two Knight Variation, Modern Defense | 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 |
| B06 | Suttles Variation, Modern Defense | 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6 |
| B06 | Mongredien Defense, Pirc | 1.e4 g6 2.d4 Bg7 3.Nf3 b6 |
| B06 | Geller's System, Modern Defense | 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c3 |
| B06 | Rossolimo Variation, Modern Defense | 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c4 Bg4 |
| B06 | Accelerated Gurgenidze | 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 c6 |
| B06 | Small Center Variation, Pirc | 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 e6 |
| B06 | Fianchetto Gambit, Modern Defense | 1.e4 g6 2.d4 f5 |
| B06 | Norwegian Defense | 1.e4 g6 2.d4 Nf6 |
| B06 | Masur Gambit | 1.e4 g6 2.d4 Nh6 3.Nc3 f5 4.Bxh6 Bxh6 5.exf5 O-O |
| B00 | Pickering (Goldsmith) Defense | 1.e4 h5 |
| B00 | Picklepuss Defense | 1.e4 h5 2.d4 Nf6 |
| B00 | Carr Defense | 1.e4 h6 |
| B00 | Zilbermints Gambit, Carr Defense | 1.e4 h6 2.d4 e5 |
| B00 | Lemming Defense | 1.e4 Na6 |
| B00 | Nimzovich Defense | 1.e4 Nc6 |
| B00 | Wheeler Gambit, Nimzovich Defense | 1.e4 Nc6 2.b4 Nxb4 3.c3 Nc6 4.d4 |
| B00 | Pseudo-Spanish Variation | 1.e4 Nc6 2.Bb5 |
| B00 | Scandanavian Variation, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 |
| B00 | Hornung Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.Be3 |
| B00 | Aachen Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.exd5 Nb4 |
| B00 | Marshall Gambit, Nimzovich | 1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3 |
| B00 | Bogoljubow Variation, Nizovich Defense | 1.e4 Nc6 2.d4 d5 3.Nc3 |
| B00 | Brandics Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.Nc3 a6 |
| B00 | Richter Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Nb8 5.f3 |
| B00 | Nimzovich Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Ne5 |
| B00 | Alekseev Variation, Nimzovich; Heinola-Deppe Gambit | 1.e4 Nc6 2.d4 d5 3.Nc3 e5 |
| B00 | Erben Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.Nc3 g6 |
| B00 | Vehre Variation, Nimzovich Defense | 1.e4 Nc6 2.d4 d5 3.Nc3 Nf6 |
| B00 | Mikenas Variation, Nimzovich Defense | 1.e4 Nc6 2.d4 d6 |
| B00 | Kennedy Variation, Nimzovich | 1.e4 Nc6 2.d4 e5 |
| B00 | Linksspringer Variation, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.d5 |
| B00 | Bileefelder Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 Bc5 |
| B00 | Burgar Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 d6 |
| B00 | Hammer Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 f6 |
| B00 | Riemann Defense, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Nc6 |
| B00 | Keres Attack, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nc3 |
| B00 | Paulsen Attack, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nf3 |
| B00 | Herford Gambit, Nimzovich Defense | 1.e4 Nc6 2.d4 e5 3.dxe5 Qh4 |
| B00 | French Connection, Nimzovich Defense | 1.e4 Nc6 2.d4 e6 |
| B00 | Neo-Mongoloid Defense, Nimzovich | 1.e4 Nc6 2.d4 f6 |
| B00 | Pirc Connection, Nimzovich Defense | 1.e4 Nc6 2.d4 g6 |
| B00 | Breyer Defense, Nimzovich | 1.e4 Nc6 2.Nc3 Nf6 |
| B00 | Williams Variation, Nimzovich | 1.e4 Nc6 2.Nf3 d6 |
| B00 | Franco-Nimzovich Variation | 1.e4 Nc6 2.Nf3 e6 |
| B00 | Colorado Defense, Nimzovich; Lean Variation | 1.e4 Nc6 2.Nf3 f5 |
| B00 | Colorado Counter Accepted, Nimzovich Defense | 1.e4 Nc6 2.Nf3 f5 3.exf5 |
| B00 | El Columpio Defense, Nimzovich Defense | 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4 |
| B02 | Alekhine's Defense; B02 | 1.e4 Nf6 |
| B02 | Krejcik Variation, Alekhine | 1.e4 Nf6 2.Bc4 |
| B02 | Fried Fox, Alekhine; Krejcik Gambit | 1.e4 Nf6 2.Bc4 Nxe4 3.Bxf7+ |
| B02 | Maroczy Variation, Alekhine | 1.e4 Nf6 2.d3 |
| B02 | Welling Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.b3 |
| B02 | Kmoch Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.d3 |
| B02 | Hunt Gambit, Alekhine; Two Pawn Attack | 1.e4 Nf6 2.e5 Nd5 3.c4 |
| B02 | Steiner Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.b3 |
| B02 | Lasker Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 |
| B02 | Mikenas Gambit, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 7.Nxd5 exd5 8.Bxd5 |
| B02 | Matsukevich Gambit, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 d6 7.Bg5 |
| B03 | B03 | 1.e4 Nf6 2.e5 Nd5 3.d4 |
| B03 | Wall Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 c5 |
| B03 | Balogh Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Bc4 |
| B03 | Hunt Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.c5 |
| B03 | Four Pawns Attack; Chase V | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 |
| B03 | Trifunovic Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 Bf5 |
| B03 | Cambridge Gambit, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 g5 |
| B04 | B04 | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 |
| B05 | B05 | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 |
| B05 | Flohr Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 c6 |
| B05 | Alekhine Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.c4 |
| B04 | Panov Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3 |
| B04 | Larsen Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5 |
| B04 | Alburt Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 |
| B04 | Keres Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4 |
| B04 | Karpov Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.c4 Nb6 6.h3 Bg7 8.Be2 |
| B04 | Schmid Variation, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6 |
| B02 | Buntin Gambit, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.e6 |
| B02 | Buckley Attack, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.Na3 |
| B02 | Saemisch Attack, Alekhine | 1.e4 Nf6 2.e5 Nd5 3.Nc3 |
| B02 | Mokele Mbembe; Knight's Tour | 1.e4 Nf6 2.e5 Ne4 |
| B02 | Retreat; Brooklyn Variation, Alekhine | 1.e4 Nf6 2.e5 Ng8 |
| B02 | Everglades Defense, Alekhine | 1.e4 Nf6 2.e5 Ng8 3.d4 f5 |
| B02 | Scandanavian Variation, Alekhine | 1.e4 Nf6 2.Nc3 d5 |
| B02 | Myers Gambit, Alekhine | 1.e4 Nf6 2.Nc3 d5 3.d3 dxe4 4.Bg5 |
| B02 | Spielmann Variation, Alekhine | 1.e4 Nf6 2.Nc3 d5 3.e5 Nfd7 4.e6 |
| B02 | Noch Gambit, Alekhine | 1.e4 Nf6 2.Nc3 d5 3.exd5 |
| B02 | Geschev Gambit, Alekhine | 1.e4 Nf6 2.Nc3 d5 3.exd5 c6 |
| B02 | John Tracy Gambit, Alekhine | 1.e4 Nf6 2.Nf3 |
| B00 | Adams Defense | 1.e4 Nh6 |
| B00 | Wild Bull Defense | 1.e4 Nh6 |
| B00 | Hippoputumus | 1.e4 Nh6 |
| A00 | Barnes; Gedult-Gunderam; Walkerling | 1.f3 |
| A00 | King's Head Opening | 1.f3 e5 2.e4 |
| A00 | Hammerschlag; Pork Chop Opening | 1.f3 e5 2.Kf2 |
| A02 | Bird's Opening; Dutch Attack | 1.f4 |
| A03 | A03 | 1.f4 d5 |
| A03 | Sturm; Mujannah | 1.f4 d5 2.c4 |
| A03 | Prokofiev Gambit, Bird | 1.f4 d5 2.e4 dxe4 3.d3 |
| A03 | Williams Gambit, Bird | 1.f4 d5 2.e4 dxe4 3.Nc3 |
| A02 | From's Gambit, Bird | 1.f4 e5 |
| A02 | Canard Formation; Double Duck | 1.f4 f5 2.d4 d5 |
| A02 | Pawn Thrust Attack, Bird | 1.f4 f5 2.d4 d5 |
| A02 | Swiss Gambit, Bird | 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4 |
| A02 | Hobbs Gambit, Bird | 1.f4 g5 |
| A02 | Batavo Polish Attack, Bird | 1.f4 Nf6 2.Nf3 g6 3.b4 |
| A03 | Horsefly Defense, Bird | 1.f4 Nh6 |
| A00 | Benko; Barczay; Bilek; Hungarian | 1.g3 |
| A00 | Gambit 59 | 1.g3 d5 2.Bg2 e5 3.b4 |
| A00 | Regan Variation | 1.g3 d5 2.Bg2 e5 3.d4 |
| A00 | Reversed Alekhine | 1.g3 e5 2.Nf3 |
| A00 | Lasker Simul Special | 1.g3 h5 |
| A00 | Grob; Ahlhausen; Colibri; Fric; Genoa; Spike | 1.g4 |
| A00 | Grob Gambit | 1.g4 d5 2.Bg2 Bxg4 |
| A00 | Romford Counter-Gambit, Grob | 1.g4 d5 2.Bg2 Bxg4 3.c4 d4 |
| A00 | Spike, Grob | 1.g4 d5 2.Bg2 c6 3.g5 |
| A00 | Short Spike, Grob | 1.g4 d5 2.Bg2 c6 3.h3 |
| A00 | Zilbermints Gambit, Grob | 1.g4 d5 2.e4 |
| A00 | Keene Defense, Grob | 1.g4 d5 2.h3 e5 |
| A00 | Hurst Attack, Grob | 1.g4 e5 2.Bg2 d5 3.c4 |
| A00 | Alessi Gambit, Grob | 1.g4 f5 |
| A00 | Double Grob | 1.g4 g5 |
| A00 | Spike Deferred | 1.g4 g6 2.d3 |
| A00 | Bucker Defense, Grob | 1.g4 Nh6 |
| A00 | Clemenz Opening | 1.h3 |
| A00 | Kadas Opening | 1.h4 |
| A00 | Despres Opening | 1.h4 |
| A00 | Koola-Koola | 1.h4 a5 |
| A00 | Wulumulu | 1.h4 e5 2.d4 |
| A00 | Durkin's Opening; Sodium Attack | 1.Na3 |
| A00 | Dunst; Heinrichsen; Will Bull; Kotrc | 1.Nc3 |
| A00 | St. George Defense, Dunst | 1.Nc3 a6 |
| A00 | Novosibirsk Variation, Dunst | 1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4 |
| A00 | Twyble Attack, Dunst | 1.Nc3 c5 2.Rb1 |
| A00 | Dunst Gambit | 1.Nc3 d5 2.e4 dxe4 3.d3 |
| A00 | Pseudo-Diemer Gambit, Dunst | 1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3 |
| A00 | Amazon, Dunst | 1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5 |
| A00 | Reversed Nimzovich | 1.Nc3 e5 |
| A00 | Battambang, Dunst | 1.Nc3 e5 2.a3 |
| A00 | Irish Attack; Polish Attack | 1.Nc3 e5 2.f4 |
| A00 | Napoleon Attack, Dunst | 1.Nc3 e5 2.Nf3 |
| A00 | Glasscoe Gambit, Dunst | 1.Nc3 f5 2.g4 |
| A00 | Anti-Pirc Variation, Dunst | 1.Nc3 g6 2.h4 |
| A00 | Tubingen Gambit, Dunst | 1.Nc3 Nf6 2.g4 |
| A04 | Reti; Zukertort; A04 | 1.Nf3 |
| A06 | A06 | 1.Nf3 d5 |
| A06 | Nimzovich Opening, Reti | 1.Nf3 d5 2.b3 |
| A06 | Bloodgood Gambit, Reti | 1.Nf3 d5 2.b3 c5 3.e4 dxe4 4.Ne5 |
| A06 | Santasiere's Folly, Reti | 1.Nf3 d5 2.b4 |
| A09 | Reti; Landstrasser G; Wolf G; A09 | 1.Nf3 d5 2.c4 |
| A09 | London V; New York V, Reti | 1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bg2 e6 5.Bb2 Nbd7 |
| A09 | Benoni Reversed; Wing Blumenfeld | 1.Nf3 d5 2.c4 d4 |
| A09 | Reti Polonaise | 1.Nf3 d5 2.c4 d4 3.b4 |
| A09 | Penguin Variation, Reti | 1.Nf3 d5 2.c4 d4 3.Rg1 |
| A09 | Reti Gambit Accepted | 1.Nf3 d5 2.c4 dxc4 |
| A09 | Neo-Catalan, Reti | 1.Nf3 d5 2.c4 e6 3.g3 |
| A06 | Old Indian Attack | 1.Nf3 d5 2.d3 |
| A06 | Tennison G; Lemberg G; Abonyi G | 1.Nf3 d5 2.e4 |
| A07 | Barcza Opening, Reti; A07 | 1.Nf3 d5 2.g3 |
| A08 | A08 | 1.Nf3 d5 2.g3 c5 |
| A06 | Reversed Mexican Defense, Reti | 1.Nf3 d5 2.Nc3 |
| A06 | Ampel Variation, Reti | 1.Nf3 d5 2.Rg1 |
| A04 | Wade Defense | 1.Nf3 d6 |
| A06 | Improved Lisitsin G, Reti | 1.Nf3 f5 2.d3 |
| A04 | Lisitsin Gambit; Polish Gambit | 1.Nf3 f5 2.e4 |
| A04 | Rydel-Bloodgood Gambit | 1.Nf3 f5 2.e4 exf4 3.Ne5 |
| A04 | Polish G; Dalesio G; Pirc-Lisitsin G | 1.Nf3 f5 2.e4 fxe4 3.Ng5 |
| A04 | Herrstrom Gambit, Reti | 1.Nf3 g5 |
| A04 | Oberndorfer Gambit; Reti | 1.Nf3 g5 |
| A04 | Lessing Defense | 1.Nf3 Nc6 |
| A05 | King's Indian Attack; Reti; Zukertort; A05 | 1.Nf3 Nf6 |
| A00 | Amar; Paris Opening | 1.Nh3 |
| A00 | Drunken Knight Opening | 1.Nh3 |
| A00 | Krazy Kat | 1.Nh3 e5 2.f3 d5 3.Nf2 |