Queen's Gambit Declined Slav - Slav gambit
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4
White advances the queen's pawn to d4. Black plays the queen's pawn to d5. White moves the c-pawn to c4.
Black pushes 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 advances the king's pawn to e4.