Colle System · Basic
Opponent's mistake · 7...Bb4
1.d4 d5 2.Nf3 Nf6 3.e3 Nc6 4.Bd3 Bg4 5.Nbd2 e5 6.dxe5 Nxe5 7.Be2 Bb4 8.Nxe5
- d4: Takes the centre with the queen's pawn, already protected by the queen.
- Nf3: Develops the knight and controls e5 before committing the pawns.
- e3: Supports d4 and frees the f1 bishop: the backbone of the Colle System.