Queen's Gambit Declined - Stonewall variation
1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 Ne4 6. Bd3 f5
White pushes the queen's pawn to d4. Black moves the queen's pawn to d5. White plays the c-pawn to c4.
Black advances the king's pawn to e6. White develops the knight to f3. Black develops the knight to f6.
White plays the king's pawn to e3. Black plays the c-pawn to c6. White jumps the knight to d2.
Black moves the knight to e4. White develops the light-squared bishop to d3. Black moves the f-pawn to f5.