Sicilian Defense: Moscow Variation, Sokolsky Variation

The Sicilian Defense: Moscow Variation, Sokolsky Variation is a chess opening classified under ECO code B52 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. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4. The resulting position leaves black to move.