Queen's Gambit Declined semi-Slav
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6
White advances the queen's pawn to d4. Black advances the queen's pawn to d5. White advances 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 transfers the knight to f3. Black plays the c-pawn to c6.