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1.e4 g6 2.d4 Bg7 3.g3 c5 4.dxc5 Qa5+ · ECO B06
Pterodactyl Defense: Fianchetto, Rhamphorhynchus is a chess opening that arises after 1.e4 g6 2.d4 Bg7 3.g3 c5 4.dxc5 Qa5+. It is classified B06 in the ECO system, and the position after these moves has white to move.
This line is a variation within the Pterodactyl Defense family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.e4 g6 2.d4 Bg7 3.g3 c5 4.dxc5 Qa5+.