Trapped pieces are trapped in a part of the chess board and are likely to be captured. The term “smothered pieces” is often used for pieces that are permanently trapped but unlikely to be captured.
Knights can also be trapped on the edge of the board, often with pawns.
Bishops can sometimes be trapped in the middle of the board, such as by a long chain of enemy pawns.
Another common bishop trap is where a Bishop captures a rook pawn ("a’ pawn or "h’ pawn), and is then trapped when the opponent moves up the adjacent knight pawn to block the Bishop’s escape.
Rooks are sometimes trapped in the middle of the board. That is one reason why rooks usually don’t come out to play until late in the game.
Trapped King? That’s called checkmate.
Related Chess Tactics
Read more about these related chess strategies: