Sicilian - Prins (Moscow) variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3
White plays the king's pawn to e4. Black advances the c-pawn to c5. White develops the knight to f3.
Black plays the queen's pawn to d6. White moves the queen's pawn to d4. Black captures on d4 with the c-pawn.
White captures with the knight on d4. Black develops the knight to f6. White plays the f-pawn to f3.