Modern Defense Trapped Piece in Chess

A “modern defense trapped piece” is a tactical motif in the Modern Defense where one side’s piece becomes boxed in by its own or the opponent’s pawn structure and limited squares. For example, after typical Modern Defense setups, a piece can be stranded on a vulnerable outpost or corner once the opponent gains tempo with pawn breaks and piece pressure. The defining feature is that the trapped piece has no realistic escape squares without losing material.