Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted

1.Nf3 g6 2.d4 Bg7 3.e4 d6 4.c4 c5 5.dxc5 Qa5+

ECO A04

The Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted is a chess opening line in the Modern Defense complex, reached after 1.Nf3 g6 2.d4 Bg7 3.e4 d6 4.c4 c5 5.dxc5 Qa5+.

It is catalogued under code A04 in the Encyclopaedia of Chess Openings (ECO).

The defining move Qa5+ is chosen by Black on move 5.

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• Catalan Opening
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Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.