Alekhine's defence - exchange variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6
White pushes the king's pawn to e4. Black develops the knight to f6. White advances the king's pawn to e5.
Black moves the knight to d5. White plays the queen's pawn to d4. Black advances the queen's pawn to d6.
White advances the c-pawn to c4. Black transfers the knight to b6. White captures on d6 with the king's pawn.