Queens Gambit Declined Pin Chess Puzzles

A queens gambit declined pin usually refers to the classic Queen's Gambit Declined structure where Black develops the light-squared bishop to g4, pinning White's knight on f3 to the queen. In the main position after 1.d4 d5 2.c4 e6, this pin is a defining idea because it helps Black challenge White's control of e4 and the center before White can build freely.