ECO A40

Colle System: Pterodactyl Variation

Colle System: Pterodactyl Variation is a chess opening classified under ECO A40. Its defining line here is 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+.

Colle System: Pterodactyl Variation — board position♜♞♝♚♞♜♟♟♟♟♟♝♟♟♛♟♟♝♟♞♟♟♟♟♟♟♜♞♝♛♚♜

1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+

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The diagram shows the position after 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+. Play through it move by move in the interactive explorer.

Opening name, ECO code, and main line come from the Lichess open chess openings dataset.