Queen's Gambit Declined Slav - 3.Nf3
1. d4 d5 2. c4 c6 3. Nf3
White pushes the queen's pawn to d4. Black moves the queen's pawn to d5. White advances the c-pawn to c4.
Black pushes the c-pawn to c6. White develops the knight to f3.
White pushes the queen's pawn to d4. Black moves the queen's pawn to d5. White advances the c-pawn to c4.
Black pushes the c-pawn to c6. White develops the knight to f3.