English Opening Trapped Piece Chess Puzzles

In the English Opening, a trapped piece usually appears after White starts with 1.c4 and the position turns into a fight over the c- and b-files, often with a bishop or knight getting boxed in by pawns. A classic feature is a piece on the edge of the board that loses its retreat squares after moves like ...b5, ...a6, or a well-timed c5/c4 structure shift.