C40: QP counter-gambit, Maroczy gambit

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