The hardest moves to compute are those of the knight, for it can leap over and around other pieces, and the moves are not in a straight line or diagonal like all of the other pieces.
最为困难的是计算马的步法，因为它跳跃其他棋子，而且它不像其他棋子那样走直线或对角线。
Requirements in the international chess board to place eight queen, making it unable to attack each other, that should not in any two of Queens board of the same line, same column and with a diagonal.
要求在国际象棋的棋盘上放置八个皇后，使其不能相互攻击，即任意两个皇后不能处于棋盘的同一行、同一列和同一条对角线上。
Requirements in the international chess board to place eight queen, making it unable to attack each other, that should not in any two of Queens board of the same line, same column and with a diagonal.
要求在国际象棋的棋盘上放置八个皇后，使其不能相互攻击，即任意两个皇后不能处于棋盘的同一行、同一列和同一条对角线上。
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