ECO A04

Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation

Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation is a chess opening classified under ECO A04. Its defining line here is 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+.

Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation — board position♜♞♝♚♞♜♟♟♟♟♟♝♟♟♛♟♟♟♟♞♟♟♟♟♟♜♞♝♛♚♝♜

1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+

Explore this opening ▸Add to my repertoireOpen in analysis

The diagram shows the position after 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 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.