Queens Gambit Declined Tarrasch Defense Pin in Chess

The queens gambit declined tarrasch defense pin is a tactical motif that arises after the Tarrasch structure in the QGD, typically after 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5. In this line, White often develops with Bg5 or places a piece so that a black piece on the d5–e6 axis (or the pinned knight/piece behind it) cannot move without consequences. The defining feature is a pin created against a piece that is tied to defending the center or recapturing on d5.