Queen's Gambit Declined semi-Slav - stonewall defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Ne4 6. Bd3 f5
White advances the queen's pawn to d4. Black pushes the queen's pawn to d5. White plays the c-pawn to c4.
Black plays the king's pawn to e6. White develops the knight to c3. Black develops the knight to f6.
White moves the knight to f3. Black pushes the c-pawn to c6. White moves the king's pawn to e3.
Black jumps the knight to e4. White develops the light-squared bishop to d3. Black plays the f-pawn to f5.