| ECO | Moves | Opening | ||
| C55 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | Two knights defence | ||
| C56 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 | Two knights defence | ||
| C57 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 | Two knights defence | ||
| C58 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 | two knights defence | ||
| C59 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 | Two knights defence |