Sicilian Defense: Coles Sicilian Gambit

The Sicilian Defense: Coles Sicilian Gambit is a chess opening classified under ECO code B21 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. d4 cxd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Bc4. The resulting position leaves black to move.