ECO C23

ECO C00–C99 — Open Games and the French Defense: 1.e4 e6 and 1.e4 e5, from the Italian and Ruy Lopez to the King's Gambit.

23 named opening lines are classified under ECO code C23.

• Bishop's Opening — 1.e4 e5 2.Bc4
• Bishop's Opening: Anderssen Gambit — 1.e4 e5 2.Bc4 b5 3.Bxb5 c6
• Bishop's Opening: Boi Variation — 1.e4 e5 2.Bc4 Bc5
• Bishop's Opening: Calabrese Countergambit — 1.e4 e5 2.Bc4 f5
• Bishop's Opening: Calabrese Countergambit, Jaenisch Variation — 1.e4 e5 2.Bc4 f5 3.d3
• 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
• Bishop's Opening: Khan Gambit — 1.e4 e5 2.Bc4 d5
• Bishop's Opening: Lewis Countergambit — 1.e4 e5 2.Bc4 Bc5 3.c3 d5
• Bishop's Opening: Lewis Countergambit, Walker Variation — 1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6 5.d4
• Bishop's Opening: Lewis Gambit — 1.e4 e5 2.Bc4 Bc5 3.d4
• 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: Lopez Gambit — 1.e4 e5 2.Bc4 Bc5 3.Qe2 Nc6 4.c3 Nf6 5.f4
• Bishop's Opening: Lopez Variation — 1.e4 e5 2.Bc4 Bc5 3.Qe2
• Bishop's Opening: Lopez Variation, Lopez Gambit — 1.e4 e5 2.Bc4 Bc5 3.Qe2 Nf6 4.f4
• Bishop's Opening: McDonnell Gambit — 1.e4 e5 2.Bc4 Bc5 3.b4
• Bishop's Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit — 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.c3
• Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit — 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.f4
• Bishop's Opening: Philidor Counterattack — 1.e4 e5 2.Bc4 c6
• 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: Stein Gambit — 1.e4 e5 2.Bc4 Bc5 3.f4
• Bishop's Opening: Thorold Gambit — 1.e4 e5 2.Bc4 b5 3.Bxb5 f5
• Bishop's Opening: del Rio Variation — 1.e4 e5 2.Bc4 Bc5 3.c3 Qg5