Queen's Pawn Game · D05

Colle System, after 1... d5, through 6. Nbd2

1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. b3 c5 5. Bb2 Nc6 6. Nbd2

White's queenside bishop takes the long diagonal.

The first 4 moves, explained

• 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
• 1... d5 Stakes a claim in the centre, controlling e4, and frees the bishop and queen.
• 2. Nf3 Develops the knight to f3, eyeing d4 and e5. It also props up the d4 pawn. Theory calls this the Zukertort Variation.
• 2... Nf6 Develops the knight to f6, eyeing d5 and e4. It also props up the d5 pawn. Theory calls this the Symmetrical Variation.

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