Slav Defence
Opponent's mistake · 6.Nb5
1.d4 d5 2.c4 c6 3.Nc3 e5 4.cxd5 cxd5 5.dxe5 d4 6.Nb5 Qa5+ 7.Bd2 Qxb5
- d5: Takes the centre and controls e4.
- c6: Defends d5 with another pawn without blocking the c8 bishop.
- e5: Winawer Countergambit: offers a pawn to open the game and develop quickly.