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
History of chess armies, such as the Norman Conquest of England. Previously little known, chess became popular in Northern Europe when figure pieces were introduced. In the 14th century, Timur played an enlarged variation of the game which is commonly referred to as Tamerlane Chess. This complex game involved each pawn having a particular purpose, as well as additional pieces. The sides are conventionally called White and Black. But, in earlier European chess writings, the sides were often called Red and Black because those were the commonly available colors of ink when handwriting drawing a chess game layout. In such layouts, each piece