Pterodactyl Defense: Western, Siroccopteryx

The Pterodactyl Defense: Western, Siroccopteryx is a chess opening classified under ECO code B06 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 g6 2. Nf3 Bg7 3. d4 c5 4. Bc4 cxd4 5. Nxd4 Qa5+. The resulting position leaves white to move.