Sicilian Defense: Chekhover Variation, Zaitsev Defense

The Sicilian Defense: Chekhover Variation, Zaitsev Defense is a chess opening classified under ECO code B53 in the Semi-Open Games family, where Black responds to 1.e4 with something other than 1...e5, including the Sicilian Defense, Caro-Kann, and Pirc. It is reached after 5 moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7. The resulting position leaves white to move.