Queen's Pawn Game: Colle System, Traditional Colle

1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.c3

ECO D05

The Queen's Pawn Game: Colle System, Traditional Colle is a chess opening line in the Queen's Pawn Game complex, reached after 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.c3.

It is catalogued under code D05 in the Encyclopaedia of Chess Openings (ECO).

The defining move c3 is chosen by White on move 5.

Do you want to learn openings?

Start with a GM-authored repertoire you study move by move, then practice against a human-like AI opponent:

• Catalan Opening
• King's Indian Defense with ...e5

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