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。-On an 8 × 8 chessboard, there are eight queens, each representing one cell Queens　requirement does not appear among mutual Queen "attack" phenomenon, which can not have two queens in the same row, same column or diagonal. Q. There are many different ways.