Petrov - classical attack - Mason variation
1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O
White plays 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 captures with the knight on e5. Black advances the queen's pawn to d6.
White jumps the knight to f3. Black captures with the knight on e4. White moves the queen's pawn to d4.
Black moves the queen's pawn to d5. White develops the light-squared bishop to d3. Black develops the dark-squared bishop to e7.
White castles kingside. Black castles kingside.