Dutch - Leningrad - main variation with c6
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6
White plays the queen's pawn to d4. Black plays the f-pawn to f5. White advances the c-pawn to c4.
Black develops the knight to f6. White advances the g-pawn to g3. Black advances the g-pawn to g6.
White develops the light-squared bishop to g2. Black develops the dark-squared bishop to g7. White develops the knight to f3.
Black castles kingside. White castles kingside. Black advances the queen's pawn to d6.
White jumps the knight to c3. Black pushes the c-pawn to c6.