Albin Countergambit · Intermediate
Opponent's mistake · 6.Bxb4
1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3 6.Bxb4 exf2+ 7.Ke2 fxg1=N+
- d5: Takes the centre and controls e4.
- e5: Countergambit: offers a pawn to open the centre and attack straight away.
- d4: The pawn advances to d4, cramping White and taking c3 away from the knight.