ECO chess code A4 - Queen Pawn Games
A40 - Queen Pawn
1. d4
A41
1. d4 d6
A42 - Modern Defence, Averbakh Variation
1. d4 d6
2. c4 g6
3. Nc3 Bg7
4. e4
A43 - Benoni
1. d4 c5
A44
1. d4 c5
2. d5 e5
A45 - Indian systems
1. d4 Nf6
A46
1. d4 Nf6
2. Nf3
A47
1. d4 Nf6
2. Nf3 b6
A48
1. d4 Nf6
2. Nf3 g6
A49
1. d4 Nf6
2. Nf3 g6
3. g3
ECO Chess Codes
Chess Openings