Benoni defence - Hromodka system
1. d4 Nf6 2. c4 c5 3. d5 d6
White advances the queen's pawn to d4. Black develops the knight to f6. White moves the c-pawn to c4.
Black plays the c-pawn to c5. White pushes the queen's pawn to d5. Black plays the queen's pawn to d6.