Library/Openings/Pterodactyl Defense/Sicilian/Pteranodon ECO B27
Opening· 11 plies

Pterodactyl Defense: Sicilian, Pteranodon

An entry in the Encyclopedia of Chess Openings (ECO B27), reached after 11 half-moves: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3.

Pterodactyl Defense: Sicilian, Pteranodon ECO B27
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Black rook
Black knight
Black bishop
Black king
Black knight
Black rook
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black queen
White pawn
White pawn
White pawn
White knight
White pawn
White pawn
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White pawn
White pawn
White rook
White bishop
White queen
White king
White bishop
White rook
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End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

Pterodactyl Defense: Sicilian, Pteranodon is an opening in the Encyclopedia of Chess Openings, classified under code B27. ECO group B (B00–B99) covers semi-open games (1.e4 with Black playing anything other than 1…e5), with the Sicilian, French, Caro-Kann and Pirc/Modern at its heart. This particular variation is reached after 11 half-moves from the starting position, with the move sequence 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3.

It belongs to the Pterodactyl Defense family. Within that family this is a level-2 branch (the Sicilian → Pteranodon line).

The opening sequence in prose form: 1.e4 c5, 2.Nf3 g6, 3.d4 Bg7, 4.dxc5 Qa5+, 5.Nc3 Bxc3+, 6.bxc3. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.