Chess opening · ECO A40
Pterodactyl Defense: Queen Pterodactyl, Quiet Line
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1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e3
Pterodactyl Defense: Queen Pterodactyl, Quiet Line is catalogued under ECO code A40. It is reached after 4 moves (7 half-moves): 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e3. After the last move it is Black to play. White opens 1. d4. It is a named variation of the Pterodactyl Defense, which has 33 catalogued lines in total.