Pirc Defense: Austrian Attack

The Pirc Defense: Austrian Attack is a chess opening classified under ECO code B09 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 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O. The resulting position leaves white to move.