Queen's Pawn Game: Colle System

An entry in the Encyclopedia of Chess Openings (ECO D04), reached after 5 half-moves: 1. d4 d5 2. Nf3 Nf6 3. e3.

Black rook — Use ← → arrows or click moves to step through.

Black knight — Use ← → arrows or click moves to step through.

Continue from this position

3 replies continue into sub-variations from this position. Click any to drill deeper.

3…Bf5 1 line
- D04 Anti-Colle
3…c5 1 line
- D05 Traditional Colle
3…g6 1 line
- D04 Grünfeld Formation

About this opening

Queen's Pawn Game: Colle System is an opening in the Encyclopedia of Chess Openings, classified under code D04. 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. e3.

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

The opening sequence in prose form: 1.d4 d5, 2.Nf3 Nf6, 3.e3. From this position 3 named continuations are recorded in the encyclopaedia, each leading to a distinct theoretical line.