French Defense La Bourdonnais Variation Trapped Piece in Chess

In the French Defense: La Bourdonnais Variation, a “trapped piece” motif occurs when the pawn structure and move order restrict escape squares for a piece—most often a minor piece that becomes tied to defending or capturing on the queenside. A defining feature is the early pawn tension and resulting restricted mobility around the c- and d-files, where a piece can be forced into a corner by pawns and limited lines.