Queen's Gambit Declined semi-Slav - 6.Bd3
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3
White moves the queen's pawn to d4. Black moves the queen's pawn to d5. White advances the c-pawn to c4.
Black pushes 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 advances the c-pawn to c6. White pushes the king's pawn to e3.
Black moves the knight to d7. White develops the light-squared bishop to d3.