Ruy Lopez - open - Riga variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 exd4
White advances 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 c6. White develops the light-squared bishop to b5. Black plays the a-pawn to a6.
White moves the light-squared bishop to a4. Black transfers the knight to f6. White castles kingside.
Black captures with the knight on e4. White advances the queen's pawn to d4. Black captures on d4 with the king's pawn.