ECO C25
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.
30 named opening lines are classified under ECO code C25.
- Vienna Gambit, with Max Lange Defense — 1.e4 e5 2.Nc3 Nc6 3.f4
- Vienna Gambit, with Max Lange Defense: Cunningham Defense — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 Be7
- Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5
- Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Alapin Variation — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 d6
- Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Thorold Variation — 1.e4 e5 2.f4 exf4 3.Nf3 Nc6 4.Nc3 g5 5.h4 g4 6.Ng5 h6 7.Nxf7 Kxf7 8.d4
- Vienna Gambit, with Max Lange Defense: Hamppe-Muzio Gambit — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-O gxf3
- Vienna Gambit, with Max Lange Defense: Knight Variation — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3
- Vienna Gambit, with Max Lange Defense: Pierce Gambit — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4
- Vienna Gambit, with Max Lange Defense: Quelle Gambit — 1.e4 e5 2.Nc3 Nc6 3.f4 Bc5 4.fxe5 d6
- Vienna Gambit, with Max Lange Defense: Steinitz Gambit — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4
- Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Fraser-Minckwitz Defense — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6
- Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Main Line — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2
- Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Paulsen Defense — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d6
- Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Sörensen Defense — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 g5
- Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Zukertort Defense — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5
- Vienna Game — 1.e4 e5 2.Nc3
- Vienna Game: Anderssen Defense — 1.e4 e5 2.Nc3 Bc5
- Vienna Game: Fyfe Gambit — 1.e4 e5 2.Nc3 Nc6 3.d4
- Vienna Game: Giraffe Attack — 1.e4 e5 2.Nc3 Bc5 3.Qg4
- Vienna Game: Hamppe-Meitner Variation — 1.e4 e5 2.Nc3 Bc5 3.Na4
- Vienna Game: Hamppe-Muzio Gambit — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-O
- Vienna Game: Hamppe-Muzio, Dubois Variation — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-O gxf3 7.Qxf3 Ne5 8.Qxf4 Qf6
- Vienna Game: Max Lange Defense — 1.e4 e5 2.Nc3 Nc6
- Vienna Game: Omaha Gambit — 1.e4 e5 2.Nc3 d6 3.f4
- Vienna Game: Paulsen Variation — 1.e4 e5 2.Nc3 Nc6 3.g3
- Vienna Game: Paulsen Variation, Mariotti Gambit — 1.e4 e5 2.Nc3 Nc6 3.g3 Bc5 4.Bg2 h5 5.Nf3 h4
- Vienna Game: Philidor Countergambit — 1.e4 e5 2.Nc3 Nc6 3.d4 f5
- Vienna Game: Pierce Gambit, Rushmere Attack — 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4 g4 6.Bc4 gxf3 7.O-O d5 8.exd5 Bg4 9.dxc6
- Vienna Game: Stanley Variation, Meitner-Mieses Gambit — 1.e4 e5 2.Nc3 Nc6 3.Bc4 Bc5 4.Qg4 Qf6 5.Nd5
- Vienna Game: Zhuravlev Countergambit — 1.e4 e5 2.Nc3 Bb4 3.Qg4 Nf6