Dutch - stonewall with Nc3
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6
White moves the queen's pawn to d4. Black pushes the f-pawn to f5. White plays the c-pawn to c4.
Black develops the knight to f6. White plays the g-pawn to g3. Black pushes the king's pawn to e6.
White develops the light-squared bishop to g2. Black develops the dark-squared bishop to e7. White develops the knight to f3.
Black castles kingside. White castles kingside. Black plays the queen's pawn to d5.
White transfers the knight to c3. Black plays the c-pawn to c6.