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ECO B23

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

9 named opening lines are classified under ECO code B23.

Sicilian Defense: Closed — 1.e4 c5 2.Nc3
Sicilian Defense: Closed, Carlsen Variation — 1.e4 c5 2.Nc3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Qd2
Sicilian Defense: Closed, Chameleon Variation — 1.e4 c5 2.Nc3 Nc6 3.Nge2
Sicilian Defense: Closed, Grob Attack — 1.e4 c5 2.Nc3 Nc6 3.g4
Sicilian Defense: Closed, Korchnoi Defense — 1.e4 c5 2.Nc3 e6 3.g3 d5
Sicilian Defense: Closed, Portland Attack — 1.e4 c5 2.Nc3 Nc6 3.d3 g6 4.g4
Sicilian Defense: Closed, Traditional — 1.e4 c5 2.Nc3 Nc6
Sicilian Defense: Grand Prix Attack — 1.e4 c5 2.Nc3 Nc6 3.f4
Sicilian Defense: Grand Prix Attack, Schofman Variation — 1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5