Pirc Defense: Austrian Attack, Ljubojevic Variation

The Pirc Defense: Austrian Attack, Ljubojevic Variation 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. Bc4. The resulting position leaves black to move.