Queen's Gambit Declined Slav - Smyslov variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6 6. e4 Bg4
White plays the queen's pawn to d4. Black moves the queen's pawn to d5. White advances the c-pawn to c4.
Black moves the c-pawn to c6. White develops the knight to f3. Black develops the knight to f6.
White transfers the knight to c3. Black captures on c4 with the queen's pawn. White pushes the a-pawn to a4.
Black jumps the knight to a6. White advances the king's pawn to e4. Black develops the light-squared bishop to g4.