Petrov - modern attack - Bardeleben variation
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6
White pushes the king's pawn to e4. Black pushes 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 advances the king's pawn to e5. Black transfers the knight to e4. White deploys the queen to e2.
Black jumps the knight to c5. White captures with the knight on d4. Black moves the knight to c6.