Queen's Gambit Declined - Semi-Tarrasch with e3
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3
White pushes the queen's pawn to d4. Black moves the queen's pawn to d5. White plays the c-pawn to c4.
Black moves the king's pawn to e6. White develops the knight to c3. Black develops the knight to f6.
White moves the knight to f3. Black plays the c-pawn to c5. White captures on d5 with the c-pawn.
Black captures with the knight on d5. White advances the king's pawn to e3.