Old Benoni - Schmid's system
1. d4 c5 2. d5 d6 3. Nc3 g6
White moves the queen's pawn to d4. Black advances the c-pawn to c5. White advances the queen's pawn to d5.
Black pushes the queen's pawn to d6. White develops the knight to c3. Black moves the g-pawn to g6.