Neo Grunfeld Defense Exchange Variation Trapped Piece in Chess

In the Neo Grunfeld Defense Exchange Variation, Black often exchanges on d4 and then tries to activate pieces against White’s center. A “trapped piece” occurs when that exchange sequence leaves one of White’s pieces (commonly a knight or bishop) short of safe squares, so it can be attacked repeatedly while Black gains time. The defining feature is that the pawn structure and piece placements after the d4 exchange restrict escape routes.