Queen's Gambit Declined - exchange - positional line - 5...c6
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6
White moves the queen's pawn to d4. Black moves the queen's pawn to d5. White advances the c-pawn to c4.
Black plays the king's pawn to e6. White develops the knight to c3. Black develops the knight to f6.
White captures on d5 with the c-pawn. Black captures on d5 with the king's pawn. White develops the dark-squared bishop to g5.
Black pushes the c-pawn to c6.