French Defence · Intermediate
Opponent's mistake · 4.Nxd4
1.e4 e6 2.Nf3 d5 3.Nc3 d4 4.Nxd4 Qxd4
- e6: Prepares ...d5 to hit e4 with the support of the e6 pawn.
- d5: Attacks the e4 pawn: the standard French plan.
- d4: Advances the pawn, kicks the knight on c3 and gains space.