Petrov - modern attack - main line
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4
White moves the king's pawn to e4. Black advances the king's pawn to e5. White develops the knight to f3.
Black develops the knight to f6. White moves the queen's pawn to d4. Black captures on d4 with the king's pawn.
White moves the king's pawn to e5. Black jumps the knight to e4. White captures with the queen on d4.