Sicilian Defense: Delayed Alapin Variation

The Sicilian Defense: Delayed Alapin Variation is a chess opening classified under ECO code B22 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 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6. The resulting position leaves white to move.