Queens Gambit Declined Chigorin Defense Pin in Chess

The queens gambit declined chigorin defense pin is a tactical motif that arises in the QGD Chigorin structure, where Black plays ...Bb4 (often after ...Nf6 and ...c5) to pin a piece to the king or to a more valuable defender. A defining feature is the bishop on b4 creating a direct line that restricts White’s ability to move the pinned piece without consequences.