Pin (chess) Pin (chess) In chess, a pin is a situation brought on by an attacking piece in which a defending piece cannot move without exposing a more valuable defending piece on its other side to capture by the attacking piece. Moving the attacking piece to bring on the pin is called pinning; the defending piece so restricted is described as pinned. Only pieces that can move an indefinite number of squares in a horizontal, vertical, or diagonal line (i.e. bishops, rooks, and queens) can pin. Kings, knights, and pawns cannot pin. Any piece can be pinned except the king, since the
Human chess Human chess Human chess is a form of chess in which people take the place of pieces. Human chess is typically played outdoors, either on a large chessboard or on the ground, and is often played at Renaissance fairs. Many human chess games are choreographed stage shows performed by actors trained in stage combat. When this is the case, piece captures are represented by choreographed fights that determine whether the piece is actually taken or not. Alternatively, the pieces may spar, following rules similar to those used by the Society for Creative Anachronism. A costumed human chess game has been