Queen's Pawn Game: London System

An entry in the Encyclopedia of Chess Openings (ECO D02), reached after 5 half-moves: 1. d4 d5 2. Nf3 Nf6 3. Bf4.

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3…c5 1 line
- D02 Pterodactyl Variation

About this opening

Queen's Pawn Game: London System is an opening in the Encyclopedia of Chess Openings, classified under code D02. ECO group D (D00–D99) covers closed games and semi-closed games beginning 1.d4 d5, covering the Queen's Gambit, Slav, Grünfeld and related queen-pawn structures. This particular variation is reached after 5 half-moves from the starting position, with the move sequence 1. d4 d5 2. Nf3 Nf6 3. Bf4.

It belongs to the Queen's Pawn Game family. Within that family this is a sub-variation (the London System line).

The opening sequence in prose form: 1.d4 d5, 2.Nf3 Nf6, 3.Bf4. From this position exactly one named continuation is recorded in the encyclopaedia.