C40: King's knight opening
1. e4 e5 2. Nf3
King's knight opening
C40 Sub-variants:
- King's knight opening
1. e4 e5 2. Nf3 - Gunderam defence
1. e4 e5 2. Nf3 Qe7 - Greco defence
1. e4 e5 2. Nf3 Qf6 - Damiano's defence
1. e4 e5 2. Nf3 f6 - QP counter-gambit (elephant gambit)
1. e4 e5 2. Nf3 d5 - QP counter-gambit, Maroczy gambit
1. e4 e5 2. Nf3 d5 3. exd5 Bd6 - Latvian counter-gambit
1. e4 e5 2. Nf3 f5 - Latvian, Nimzovich variation
1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Ne3 - Latvian, Fraser defence
1. e4 e5 2. Nf3 f5 3. Nxe5 Nc6 - Latvian gambit, 3.Bc4
1. e4 e5 2. Nf3 f5 3. Bc4 - Latvian, Behting variation
1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. Nf7 Qxg2 6. Rf1 d5 7. Nxh8 Nf6 - Latvian, Polerio variation
1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5 - Latvian, corkscrew counter-gambit
1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Nf6