Queen's Gambit Declined Slav - Dutch - Lasker variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 Na6
White moves the queen's pawn to d4. Black plays the queen's pawn to d5. White pushes the c-pawn to c4.
Black plays the c-pawn to c6. White develops the knight to f3. Black develops the knight to f6.
White jumps the knight to c3. Black captures on c4 with the queen's pawn. White pushes the a-pawn to a4.
Black develops the light-squared bishop to f5. White moves the king's pawn to e3. Black moves the knight to a6.