Queen's Gambit Declined - semi-Slav - Noteboom variation
1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4
White moves 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 c3. Black pushes the c-pawn to c6.
White moves the knight to f3. Black captures on c4 with the queen's pawn.