Pterodactyl Defense: Sicilian, Benoni Gambit
ECO B27
Move order
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. d5
Ideas
ECO B covers semi-open games after 1. e4 where Black does not reply …e5. White stakes a claim in the center and opens lines for the bishop and queen. This entry tracks a longer branch in the opening tree. Use the diagram and SAN list to recognize the tabiya, then try the line against Maia to explore typical plans in practice.