Queen's Gambit Declined - Tarrasch defence - Tarrasch gambit
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5
White moves the queen's pawn to d4. Black plays the queen's pawn to d5. White pushes the c-pawn to c4.
Black pushes the king's pawn to e6. White develops the knight to c3. Black moves the c-pawn to c5.
White captures on d5 with the c-pawn. Black captures on d5 with the king's pawn. White captures on c5 with the queen's pawn.
Black moves the queen's pawn to d4. White transfers the knight to a4. Black plays the b-pawn to b5.