Ruy Lopez - modern Steinitz defence - Duras (Keres) variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4
White moves 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 advances the a-pawn to a6.
White places the light-squared bishop to a4. Black plays the queen's pawn to d6. White advances the c-pawn to c4.