Queen's Gambit Declined - Tarrasch defence - 4.cd ed
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5
White plays the queen's pawn to d4. Black pushes the queen's pawn to d5. White moves the c-pawn to c4.
Black pushes the king's pawn to e6. White develops the knight to c3. Black advances the c-pawn to c5.
White captures on d5 with the c-pawn. Black captures on d5 with the king's pawn.