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
Chess in China by 30% each year. Fortunately for the Chinese Chess Association, in 1993, it received an endowment fund from Singapore businessman S T Lee who donated about US $1.5 million. 10% of this donation was for the establishment of the chess library at China QiYuan. The remaining 90% were deposited in a fixed account from which the Chinese Chess Association drew interest mainly for its administrative operations and to send players for overseas competitions. In 1997, the Chinese Chess Association founded a computer company to fund its other activities on an annual basis. Decision making is done collectively and any final