Queen's Pawn Game: Colle System, Grünfeld Formation

1.d4 d5 2.Nf3 Nf6 3.e3 g6 4.Bd3 Bg7

ECO D04

The Queen's Pawn Game: Colle System, Grünfeld Formation is a chess opening line in the Queen's Pawn Game complex, reached after 1.d4 d5 2.Nf3 Nf6 3.e3 g6 4.Bd3 Bg7.

It is catalogued under code D04 in the Encyclopaedia of Chess Openings (ECO).

The defining move Bg7 is chosen by Black on move 4.

Study this line with a grandmaster

This position is covered in the Beat the London System course: a GM-authored repertoire you study move by move, then practice against a human-like AI opponent.

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