ECO C33
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.
45 named opening lines are classified under ECO code C33.
- King's Gambit Accepted — 1.e4 e5 2.f4 exf4
- King's Gambit Accepted: Basman Gambit — 1.e4 e5 2.f4 exf4 3.Qe2
- King's Gambit Accepted: Bishop's Gambit — 1.e4 e5 2.f4 exf4 3.Bc4
- King's Gambit Accepted: Bishop's Gambit, Anderssen Defense — 1.e4 e5 2.f4 exf4 3.Bc4 g5
- King's Gambit Accepted: Bishop's Gambit, Anderssen Variation — 1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 c6
- King's Gambit Accepted: Bishop's Gambit, Bledow Countergambit — 1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 Nf6
- King's Gambit Accepted: Bishop's Gambit, Bledow Variation — 1.e4 e5 2.f4 exf4 3.Bc4 d5
- King's Gambit Accepted: Bishop's Gambit, Boden Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nc6
- King's Gambit Accepted: Bishop's Gambit, Bogoljubow Defense — 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 c6
- King's Gambit Accepted: Bishop's Gambit, Bogoljubow Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3
- King's Gambit Accepted: Bishop's Gambit, Boren-Svenonius Variation — 1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 Qh4+ 5.Kf1 Bd6
- King's Gambit Accepted: Bishop's Gambit, Bryan Countergambit — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 b5
- King's Gambit Accepted: Bishop's Gambit, Chigorin's Attack — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d5 5.Bxd5 g5 6.g3
- King's Gambit Accepted: Bishop's Gambit, Classical Defense — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Ne7 5.Nc3 g5 6.d4 Bg7
- King's Gambit Accepted: Bishop's Gambit, Classical Defense, Cozio Attack — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Qf3
- King's Gambit Accepted: Bishop's Gambit, Cozio Defense — 1.e4 e5 2.f4 exf4 3.Bc4 Nf6
- King's Gambit Accepted: Bishop's Gambit, Cozio Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d6
- King's Gambit Accepted: Bishop's Gambit, First Jaenisch Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nf6
- King's Gambit Accepted: Bishop's Gambit, Fraser Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 fxg3 7.Qf3
- King's Gambit Accepted: Bishop's Gambit, Gianutio Gambit — 1.e4 e5 2.f4 exf4 3.Bc4 f5
- King's Gambit Accepted: Bishop's Gambit, Greco Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Bc5
- King's Gambit Accepted: Bishop's Gambit, Grimm Attack — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 d6 7.e5
- King's Gambit Accepted: Bishop's Gambit, Kieseritzky Gambit — 1.e4 e5 2.f4 exf4 3.Bc4 b5
- King's Gambit Accepted: Bishop's Gambit, Lopez Defense — 1.e4 e5 2.f4 exf4 3.Bc4 c6
- King's Gambit Accepted: Bishop's Gambit, Lopez Variation — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5
- King's Gambit Accepted: Bishop's Gambit, Maurian Defense — 1.e4 e5 2.f4 exf4 3.Bc4 Nc6
- King's Gambit Accepted: Bishop's Gambit, McDonnell Attack — 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3
- King's Gambit Accepted: Bishop's Gambit, Paulsen Attack — 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 Bb4 5.e5
- King's Gambit Accepted: Bishop's Gambit, Steinitz Defense — 1.e4 e5 2.f4 exf4 3.Bc4 Ne7
- King's Gambit Accepted: Breyer Gambit — 1.e4 e5 2.f4 exf4 3.Qf3
- King's Gambit Accepted: Carrera Gambit — 1.e4 e5 2.f4 exf4 3.Qh5
- King's Gambit Accepted: Dodo Variation — 1.e4 e5 2.f4 exf4 3.Qg4
- King's Gambit Accepted: Eisenberg Variation — 1.e4 e5 2.f4 exf4 3.Nh3
- King's Gambit Accepted: Gaga Gambit — 1.e4 e5 2.f4 exf4 3.g3
- King's Gambit Accepted: Lopez-Gianutio Countergambit, Hein Variation — 1.e4 e5 2.f4 exf4 3.Bc4 f5 4.Qe2 Qh4+ 5.Kd1 fxe4 6.Nc3 Kd8
- King's Gambit Accepted: Mason-Keres Gambit — 1.e4 e5 2.f4 exf4 3.Nc3
- King's Gambit Accepted: Orsini Gambit — 1.e4 e5 2.f4 exf4 3.b3
- King's Gambit Accepted: Paris Gambit — 1.e4 e5 2.f4 exf4 3.Ne2
- King's Gambit Accepted: Schurig Gambit, with Bb5 — 1.e4 e5 2.f4 exf4 3.Bb5
- King's Gambit Accepted: Schurig Gambit, with Bd3 — 1.e4 e5 2.f4 exf4 3.Bd3
- King's Gambit Accepted: Stamma Gambit — 1.e4 e5 2.f4 exf4 3.h4
- King's Gambit Accepted: Tartakower Gambit — 1.e4 e5 2.f4 exf4 3.Be2
- King's Gambit Accepted: Tartakower Gambit, Weiss Defense — 1.e4 e5 2.f4 exf4 3.Be2 f5 4.exf5 d6
- King's Gambit Accepted: Tumbleweed — 1.e4 e5 2.f4 exf4 3.Kf2
- King's Gambit Accepted: Villemson Gambit — 1.e4 e5 2.f4 exf4 3.d4