A00 Irregular Openings

1. g3Benko Opening
2. b4Sokolsky (Polish Opening)
3. Others

 

A01 Nimzo-Larsen Attack

1. b3

 

A02 Bird’s Opening

1. f4

 

A03

1. f4 d5

 

A04 Reti Opening

1. Nf3

 

A05 Reti Opening with 1…Nf6

1. Nf3 Nf6

 

A06 Reti Opening with 1…d5

1. Nf3 d5

 

A07 Reti Opening, Barcza System

1. Nf3 d52. g3

 

A08

1. Nf3 d52. g3 c53. Bg2

 

A09 Reti Opening

1. Nf3 d52. c4

 

 

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A1 English Opening

 

A10 English Opening

1. c4

 

A11 English Opening, systems with 1…c6

1 c4 c6

A12 (Reti Opening)

1 c4 c6 2. Nf3 d5 3. b3

 

A13 English Opening, systems with 1…e6

1 c4 e6

 

A14 (Reti Opening)

1 c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O

 

A15 English Opening, systems with 1…Nf6

1 c4 Nf6

 

A16

1 c4 Nf6 2. Nc3

 

A17 English Opening, Anglo-Indian

1 c4 Nf6 2. Nc3 e6

 

A18 English Opening, Flohr-Mikenas Variation

1 c4 Nf6 2. Nc3 e6 3. e4

 

A19

1 c4 Nf6 2. Nc3 e6 3. e4 c5

 

 

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A2 English Opening with 1…e5 (King’s English or Reversed Sicilian)

 

A20 English Opening, Reversed Sicilian

1. c4 e5

 

A21

1. c4 e52. Nc3

 

A22

1. c4 e52. Nc3 Nf6

 

A23

1. c4 e52. Nc3 Nf63. g3 c6

 

A24

1. c4 e52. Nc3 Nf63. g3 g6

 

A25 English Opening, Reversed Sicilian, Closed Systems

1. c4 e52. Nc3 Nc6

 

A26

1. c4 e52. Nc3 Nc63. g3 g6 4. Bg2 Bg7 5. d3 d6

 

A27

1. c4 e52. Nc3 Nc63. Nf3

 

A28 English Opening, Reversed Sicilian, Four Knights’ Variation

1. c4 e52. Nc3 Nc63. Nf3 Nf6

 

A29

1. c4 e52. Nc3 Nc63. Nf3 Nf6 4. g3

 

 

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A3 Symmetrical English

 

A30 Symmetrical English

1. c4 c5

 

A31

1. c4 c52. Nf3 Nf63. d4

 

A32

1. c4 c52. Nf3 Nf63. d4 cd4 4. Nd4 e6

 

A33

1. c4 c52. Nf3 Nf63. d4 cd4 4. Nd4 e6 5. Nc3 Nc6

 

A34

1. c4 c52. Nc3

 

A35 Symmetrical English, Closed systems

1. c4 c52. Nc3 Nc6

 

A36

1. c4 c52. Nc3 Nc63. g3

 

A37

1. c4 c52. Nc3 Nc63. g3 g6 4. Bg2 Bg7 5. Nf3

 

A38

1. c4 c52. Nc3 Nc63. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6

 

A39 English Opening, Maroczy Bind

1. c4 c52. Nc3 Nc63. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6
2. O-O O-O7. d4

 

 

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A4 Queen Pawn games

 

A40 Queen Pawn games

1. d4

 

A41 Queen Pawn games, systems with 1…d6

1. d4 d6

A42 Modern Defence, Averbakh Variation

1. d4 d62. c4 g63. Nc3 Bg7 4. e4

 

A43 Benoni

1. d4 c5

 

A44 Old Benoni (…g6) or Czech Benoni (…Be7)

1. d4 c52. d5 e5

 

A45 Indian systems

1. d4 Nf6

 

A46 Indian systems with 2. Nf3

1. d4 Nf62. Nf3

 

A47

1. d4 Nf62. Nf3 b6

 

A48

1. d4 Nf62. Nf3 g6

 

A49

1. d4 Nf62. Nf3 g63. g3