ECO C34
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.
12 named opening lines are classified under ECO code C34.
- King's Gambit Accepted: Becker Defense — 1.e4 e5 2.f4 exf4 3.Nf3 h6
- King's Gambit Accepted: Bonsch-Osmolovsky Variation — 1.e4 e5 2.f4 exf4 3.Nf3 Ne7
- King's Gambit Accepted: Fischer Defense — 1.e4 e5 2.f4 exf4 3.Nf3 d6
- King's Gambit Accepted: Fischer Defense, Schulder Gambit — 1.e4 e5 2.f4 exf4 3.Nf3 d6 4.b4
- King's Gambit Accepted: Fischer Defense, Spanish Variation — 1.e4 e5 2.f4 exf4 3.Nf3 d6 4.d4 Nf6 5.Bd3
- King's Gambit Accepted: Gianutio Countergambit — 1.e4 e5 2.f4 exf4 3.Nf3 f5
- King's Gambit Accepted: Greco Gambit — 1.e4 e5 2.f4 exf4 3.Nf3 d6 4.Bc4 h6 5.d4 g5 6.h4 Bg7
- King's Gambit Accepted: King's Knight's Gambit — 1.e4 e5 2.f4 exf4 3.Nf3
- King's Gambit Accepted: MacLeod Defense — 1.e4 e5 2.f4 exf4 3.Nf3 Nc6
- King's Gambit Accepted: Schallopp Defense — 1.e4 e5 2.f4 exf4 3.Nf3 Nf6
- King's Gambit Accepted: Schallopp Defense, Tashkent Attack — 1.e4 e5 2.f4 exf4 3.Nf3 Nf6 4.e5 Nh5 5.g4
- King's Gambit Accepted: Wagenbach Defense — 1.e4 e5 2.f4 exf4 3.Nf3 h5