St. George Defense: Polish Variation

The St. George Defense: Polish Variation is a chess opening classified under ECO code B00 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 4 moves: 1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 e6. The resulting position leaves white to move.