Ruy Lopez - classical defence - Charousek variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Bb6
White pushes the king's pawn to e4. Black plays 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 develops the dark-squared bishop to c5.
White advances the c-pawn to c3. Black moves the dark-squared bishop to b6.