Nimzowitsch Defense Trapped Piece in Chess

In the Nimzowitsch Defense, a “nimzowitsch defense trapped piece” is a tactical motif where one side’s piece becomes overextended and loses escape squares after the position is fixed by moves like ...Nf6 and ...c5 (often via the typical ...Bb4 or ...cxd4 structures). The defining feature is that the trapped piece is not immediately captured, but it can’t safely retreat because the opponent controls its only routes.