ECO B20

ECO B00–B99 — Semi-Open Games other than the French: 1.e4 answered by the Sicilian, Caro-Kann, Scandinavian, Alekhine, Pirc and more.

27 named opening lines are classified under ECO code B20.

• Sicilian Defense — 1.e4 c5
• Sicilian Defense: Amazon Attack — 1.e4 c5 2.Qg4
• Sicilian Defense: Big Clamp Formation — 1.e4 c5 2.d3 Nc6 3.c3 d6 4.f4
• Sicilian Defense: Bowdler Attack — 1.e4 c5 2.Bc4
• Sicilian Defense: Brick Variation — 1.e4 c5 2.Nh3
• Sicilian Defense: Czerniak Attack — 1.e4 c5 2.b3
• Sicilian Defense: Czerniak Attack, Queen Fianchetto Variation — 1.e4 c5 2.b3 b6
• Sicilian Defense: Euwe Attack, Prins Gambit — 1.e4 c5 2.b3 d5 3.Bb2
• Sicilian Defense: Gloria Variation — 1.e4 c5 2.c4 d6 3.Nc3 Nc6 4.g3 h5
• Sicilian Defense: Grob Variation — 1.e4 c5 2.g4
• Sicilian Defense: Keres Variation — 1.e4 c5 2.Ne2
• Sicilian Defense: King David's Opening — 1.e4 c5 2.Ke2
• Sicilian Defense: Kronberger Variation — 1.e4 c5 2.Na3
• Sicilian Defense: Kronberger Variation, Nemeth Gambit — 1.e4 c5 2.Na3 Nc6 3.d4 cxd4 4.Bc4
• Sicilian Defense: Lasker-Dunne Attack — 1.e4 c5 2.g3
• Sicilian Defense: Mengarini Variation — 1.e4 c5 2.a3
• Sicilian Defense: Myers Attack, with a4 — 1.e4 c5 2.a4
• Sicilian Defense: Myers Attack, with h4 — 1.e4 c5 2.h4
• Sicilian Defense: Staunton-Cochrane Variation — 1.e4 c5 2.c4
• Sicilian Defense: Wing Gambit — 1.e4 c5 2.b4
• Sicilian Defense: Wing Gambit, Abrahams Variation — 1.e4 c5 2.b4 cxb4 3.Bb2
• Sicilian Defense: Wing Gambit, Carlsbad Variation — 1.e4 c5 2.b4 cxb4 3.a3 bxa3
• Sicilian Defense: Wing Gambit, Marienbad Variation — 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2
• Sicilian Defense: Wing Gambit, Marshall Variation — 1.e4 c5 2.b4 cxb4 3.a3
• Sicilian Defense: Wing Gambit, Nanu Gambit — 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Nf3 e5 6.c4 Qe6 7.Bd3
• Sicilian Defense: Wing Gambit, Romanian Defense — 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Nf3 e5 6.Bb2 Nc6 7.c4 Qe6
• Sicilian Defense: Wing Gambit, Santasiere Variation — 1.e4 c5 2.b4 cxb4 3.c4