Chess Opening Theory/ECO volume A

=ECO index: A00--A99=
 * A00: Uncommon Openings: 1. g3 (Benko Opening), 1. Nc3 (Sleipner Opening), 1. a3 (Anderssen's Opening), 1. b4 (Polish Opening), 1. g4 (Grob's Attack), 1. h3 (Basmanic Defence), 1. c3 (Saragossa Opening), 1. d3 (Mieses Opening), 1. e3 (French Attack), 1. h4 (Desprez Opening), 1. a4 (Ware Opening), 1. Nh3 (Amar Opening), 1. Na3 (Durkin's Attack), 1. f3 (Gedult's Opening), 1. e3 e5 2. e4 (King's Isa Reverse)
 * A01: Nimzowitsch-Larsen Attack: 1. b3
 * A02: Bird's Opening: 1. f4
 * A03: Bird's Opening: 1. f4 d5
 * A04: Reti Opening: 1. Nf3
 * A05: Reti Opening: 1. Nf3 Nf6
 * A06: Reti Opening: 1. Nf3 d5
 * A07: King's Indian Attack: 1. Nf3 d5 2. g3
 * A08: King's Indian Attack: 1. Nf3 d5 2. g3 c5 3. Bg2
 * A09: Reti Opening: 1. Nf3 d5 2. c4
 * A10: English: 1. c4
 * A11: English, Anglo-Slav System: 1. c4 c6
 * A12: English with b3: 1. c4 c6 2. Nf3 d5 3. b3
 * A13: English: 1. c4 e6
 * A14: English: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O
 * A15: English: 1. c4 Nf6
 * A16: English: 1. c4 Nf6 2. Nc3
 * A17: English: 1. c4 Nf6 2. Nc3 e6
 * A18: English, Mikenas-Carls: 1. c4 Nf6 2. Nc3 e6 3. e4
 * A19: English, Mikenas-Carls, Sicilian Variation: 1. c4 Nf6 2. Nc3 e6 3. e4 c5
 * A20: English: 1. c4 e5
 * A21: English: 1. c4 e5 2. Nc3
 * A22: English: 1. c4 e5 2. Nc3 Nf6
 * A23: English, Bremen System, Keres Variation: 1. c4 e5 2. Nc3 Nf6 3. g3 c6
 * A24: English, Bremen System with ...g6: 1. c4 e5 2. Nc3 Nf6 3. g3 g6
 * A25: English: 1. c4 e5 2. Nc3 Nc6
 * A26: English: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
 * A27: English, Three Knights System: 1. c4 e5 2. Nc3 Nc6 3. Nf3
 * A28: English: 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6
 * A29: English, Four Knights, Kingside Fianchetto: 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 g3
 * A30: English, Symmetrical: 1. c4 c5
 * A31: English, Symmetrical, Benoni Formation: 1. c4 c5 2. Nf3 Nf6 3. d4
 * A32: English, Symmetrical Variation: 1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6
 * A33: English, Symmetrical: 1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nc6
 * A34: English, Symmetrical: 1. c4 c5 2. Nc3
 * A35: English, Symmetrical: 1. c4 c5 2. Nc3 Nc6
 * A36: English, Symmetrical: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
 * A37: English, Symmetrical: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3
 * A38: English, Symmetrical: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6
 * A39: English, Symmetrical: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d4
 * A40: Unusual Black responses to 1. d4: 1...e5 (Englund Gambit), 1...b5 (Polish Defence), 1...Nc6 (Nimzowitsch Defence), 1...g6 (Modern Defence without 2. e4), 1...e6 (French Indian Defence).
 * A41: Tartakower System: 1. d4 d6
 * A42: Tartakower System with 2. c4: 1. d4 d6 2.c4
 * A43: Various Benonis: 1. d4 c5
 * A44: Old Benoni: 1. d4 c5 2. d5 e5
 * A44: Semi-Benoni: 1. d4 c5 2. d5 e5 3. e4 d6
 * A45: Unusual Indian Openings: 1. d4 Nf6
 * A45: Trompowsky Attack: 1. d4 Nf6 2. Bg5
 * A46: Unusual Indian Openings with 2. Nf3: 1. d4 Nf6 2. Nf3
 * A47: Unusual Indian Openings with 2. Nf3: 1. d4 Nf6 2. Nf3 b6
 * A48: Torre Attack with 2...e6: 1. d4 Nf6 2. Nf3 e6 3. Bg5
 * A48: Torre Attack with 2...g6: 1. d4 Nf6 2. Nf3 g6 3. Bg5
 * A48: London System: 1. d4 Nf6 2. Nf3 e6 3. Bf4
 * A49: Fianchetto Variation: 1. d4 Nf6 2. Nf3 e6 3. g3
 * A50: Black Knights' Tango: 1. d4 Nf6 2. c4 Nc6
 * A51: Budapest Gambit Declined and Unusual Lines: 1. d4 Nf6 2. c4 e5
 * A52: Budapest Gambit Main Lines: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4
 * A53: Old Indian Defence: 1. d4 Nf6 2. c4 d6
 * A54: Old Indian Defence main lines: 1. d4 Nf6 2. c4 d6 3. Nc3 e5
 * A55: Old Indian Defence main lines: 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3
 * A56: Czech Benoni: 1. d4 Nf6 2. c4 c5 3. d5
 * A57: Benko/Volga Gambit sidelines: 1. d4 Nf6 2. c4 c5 3. d5 b5
 * A58: Benko/Volga Gambit Accepted: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5
 * A59: Benko/Volga Gambit Accepted (White castles by hand): 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4
 * A60: Modern Benoni and early divergences: 1. d4 Nf6 2. c4 c5 3. d5 e6
 * A61: Modern Benoni without early e4: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6
 * A62: Modern Benoni, Fianchetto Variation without early ...Nbd7: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3
 * A63: Modern Benoni, Fianchetto Variation sidelines: 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
 * A64: Modern Benoni, Fianchetto Variation main line: 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 Re8 10. Nd2 Nbd7
 * A65: Modern Benoni, sidelines with early e4: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4
 * A66: Modern Benoni, Mikenas Attack: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5
 * A67: Modern Benoni, Taimanov Variation: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+
 * A68: Modern Benoni, Four Pawns Attack without 9...Re8: 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. Bd3
 * A69: Modern Benoni, Four Pawns Attack with 9...Re8: 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. Re8
 * A70: Modern Benoni, 7.Nf3: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3
 * A71: Modern Benoni, 7.Nf3 Bg7 8.Bg5 without Be2: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Bg5
 * A72: Modern Benoni, Classical Variation with Bg5: 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. Bg5
 * A73: Modern Benoni, Classical Variation and unusual Black 9th moves: 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: Modern Benoni, Classical Variation with 9...a6: 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: Modern Benoni, Classical Variation main line: 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: Modern Benoni, Classical Variation with 9...Re8 10.Qc2: 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. Qc2
 * A77: Modern Benoni, Classical Variation with 9...Re8 10.Nd2: 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: Modern Benoni, Classical Variation with 10...Na6: 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: Modern Benoni, Classical Variation with 10...Na6 11.f3: 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
 * A80: Dutch Defence and unusual White second moves: 1. d4 f5
 * A81: Dutch Defence with 2.g3: 1. d4 f5 2. g3
 * A82: Dutch Defence, Staunton Gambit: 1. d4 f5 2. e4
 * A83: Dutch Defence, Staunton Gambit with 3.Nc3 Nf6 4.Bg5: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5
 * A84: Dutch Defence, 2.c4: 1. d4 f5 2. c4
 * A85: Dutch Defence, 2.c4 Nf6 3.Nc3: 1. d4 f5 2. c4 Nf6 3. Nc3
 * A86: Dutch Defence, Leningrad Variation sidelines: 1. d4 f5 2. c4 Nf6 3. g3
 * A87: Dutch Defence, Leningrad Variation with 5.Nf3: 1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3
 * A88: Dutch Defence, Leningrad Variation main line 7...c6: 1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6
 * A89: Dutch Defence, Leningrad Variation main line 7...Nc6: 1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 Nc6
 * A90: Dutch Defence sidelines and Stonewall: 1. d4 f5 2. c4 Nf6 3. g3 e6
 * A91: Dutch Defence, Classical Variation sidelines: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7
 * A92: Dutch Defence, Classical Stonewall with ...Be7 and early deviations: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3
 * A93: Dutch Defence, Classical Stonewall with 7.b3: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 d5 6. O-O O-O 7. b3
 * A94: Dutch Defence, Classical Stonewall with 7.b3 c6 8.Ba3: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 d5 6. O-O O-O 7. b3 c6 8. Ba3
 * A95: Dutch Defence, Classical Stonewall with 7.Nc3 c6: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 d5 6. O-O O-O 7. Nc3 c6
 * A96: Dutch Defence, Ilyin-Genevsky Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6
 * A97: Dutch Defence, Ilyin-Genevsky Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8
 * A98: Dutch Defence, Ilyin-Genevsky Variation with 8.Qc2: 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
 * A99: Dutch Defence, Ilyin-Genevsky Variation with 8.b3: 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

ECO volumes

 * ECO volume A A00-A99
 * ECO volume B B00-B99
 * ECO volume C C00-C99
 * ECO volume D D00-D99
 * ECO volume E E00-E99