C23: Bishop's opening, Calabrese counter-gambit

C23 Sub-variants:

• Bishop's opening
  1. e4 e5 2. Bc4
• Bishop's opening, Philidor counter-attack
  1. e4 e5 2. Bc4 c6
• Bishop's opening, Lisitsyn variation
  1. e4 e5 2. Bc4 c6 3. d4 d5 4. exd5 cxd5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. dxe5 Nxe5 8. Ne2
• Bishop's opening, Calabrese counter-gambit
  1. e4 e5 2. Bc4 f5
• Bishop's opening, Calabrese counter-gambit, Jaenisch variation
  1. e4 e5 2. Bc4 f5 3. d3
• Bishop's opening, Classical variation
  1. e4 e5 2. Bc4 Bc5
• Bishop's opening, Lopez gambit
  1. e4 e5 2. Bc4 Bc5 3. Qe2 Nc6 4. c3 Nf6 5. f4
• Bishop's opening, Philidor variation
  1. e4 e5 2. Bc4 Bc5 3. c3
• Bishop's opening, Pratt variation
  1. e4 e5 2. Bc4 Bc5 3. c3 Nf6 4. d4 exd4 5. e5 d5 6. exf6 dxc4 7. Qh5 O-O
• Bishop's opening, Lewis counter-gambit
  1. e4 e5 2. Bc4 Bc5 3. c3 d5
• Bishop's opening, del Rio variation
  1. e4 e5 2. Bc4 Bc5 3. c3 Qg5
• Bishop's opening, Lewis gambit
  1. e4 e5 2. Bc4 Bc5 3. d4
• Bishop's opening, Wing gambit
  1. e4 e5 2. Bc4 Bc5 3. b4
• Bishop's opening, MacDonnell double gambit
  1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4
• Bishop's opening, Four pawns' gambit
  1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 exf4 5. Nf3 Be7 6. d4 Bh4+ 7. g3 fxg3 8. O-O gxh2+ 9. Kh1