King's pawn opening (B00)
e4
e4
| Alekhine's defence (B02) Nf6 | Na6 Lemming defence (B00) |
| Balogh defence (A82) d6 d4 f5 | Nc6 KP Nimzovich defence (B00) |
| Barnes defence (B00) f6 | Nf6 Alekhine's defence (B02) |
| Caro-Kann defence (B10) c6 | Nh6 d4 g6 c4 f6 Hippopotamus defence (B00) |
| Carr's defence (B00) h6 | a5 Corn stalk defence (B00) |
| Corn stalk defence (B00) a5 | a6 St. George defence (B00) |
| Fred (B00) f5 | b6 Owen defence (B00) |
| French defence (C00) e6 | c5 Sicilian defence (B20) |
| Hippopotamus defence (B00) Nh6 d4 g6 c4 f6 | c6 Caro-Kann defence (B10) |
| KP Nimzovich defence (B00) Nc6 | d5 Scandinavian defence (B01) |
| King's pawn game (C20) e5 | d6 d4 Nf6 Pirc defence (B07) |
| Lemming defence (B00) Na6 | d6 d4 e6 Lengfellner system (C00) |
| Lengfellner system (C00) d6 d4 e6 | d6 d4 f5 Balogh defence (A82) |
| Owen defence (B00) b6 | e5 King's pawn game (C20) |
| Pirc defence (B07) d6 d4 Nf6 | e6 French defence (C00) |
| Reversed Grob (B00) g5 | f5 Fred (B00) |
| Robatsch defence (B06) g6 | f6 Barnes defence (B00) |
| Scandinavian defence (B01) d5 | g5 Reversed Grob (B00) |
| Sicilian defence (B20) c5 | g6 Robatsch defence (B06) |
| St. George defence (B00) a6 | h6 Carr's defence (B00) |