Polish Opening Kings Indian Variation Trapped Piece in Chess

In the Polish Opening, Kings Indian Variation, a “trapped piece” motif occurs when Black’s setup (often with …b6/…Bb7 and …Nf6) leaves a key piece short of safe squares. A defining feature is that White can force a piece—commonly a knight or bishop—into a net of limited mobility using tempo moves and pawn breaks typical to this line. The result is a piece that can’t retreat without losing material or allowing a decisive gain.