Pterodactyl Defense: Eastern, Benoni Pterodactyl
ECO B06
Move order
1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5
Ideas
ECO B covers semi-open games after 1. e4 where Black does not reply …e5. White builds a pawn center and keeps the position more closed than after 1. e4. 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.