Home › Openings › Sicilian Defense › Sicilian Defense: Hyperaccelerated Pterodactyl Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation ECO B27 · 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+ Practice this opening · Play against the computer