Queen's Pawn Game: Colle System, Traditional Colle

An entry in the Encyclopedia of Chess Openings (ECO D05), reached after 9 half-moves: 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. c3.

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

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

End of this line

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

About this opening

Queen's Pawn Game: Colle System, Traditional Colle is an opening in the Encyclopedia of Chess Openings, classified under code D05. 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 9 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. c3.

It belongs to the Queen's Pawn Game family. Within that family this is a level-2 branch (the Colle System → Traditional Colle line). The immediate parent line is Queen's Pawn Game: Colle System, transitioned via 5.c3.

The opening sequence in prose form: 1.d4 Nf6, 2.Nf3 e6, 3.e3 c5, 4.Bd3 d5, 5.c3. 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.