Dutch - stonewall variation
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5
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 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 moves the queen's pawn to d5.