Sicilian Defense: Richter-Rauzer Variation

The Sicilian Defense: Richter-Rauzer Variation is a chess opening classified under ECO code B62 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 6 moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6. The resulting position leaves white to move.