在一个8×8国际象棋盘上，有8个皇后，每个皇后占一格；要求皇后间不会出现相互“攻击”的现象，即不能有两个皇后处在同一行、同一列或同一对角线上。问共有多少种不同的方法。-In an 8 × 8 chess set, there' s eight, each accounting for one' s cell　request will not be mutual between Queen' s " attack"　phenomenon, that should not have two Queens in the same line, the same row or the same diagonal. Asked how many different ways.