Queens Gambit Declined Cambridge Springs Defense Trapped Piece in Chess

In the Queens Gambit Declined Cambridge Springs Defense, the “trapped piece” motif occurs when Black’s pressure and piece placement (often after …Qa5 and …c5 ideas) restrict a White piece’s escape squares. A defining feature is that White’s development or pawn structure leaves a piece—commonly a knight or bishop—short of safe retreats, so it can be targeted and immobilized. The result is a tactical or strategic win of time, pawn, or even the piece if White can’t break the net.