在8*8的国际象棋的棋盘上摆8个皇后，使他们之间不能相互攻击。即任意两个皇后不能位于同一行、同一列或同一对角线上。以下为一种可能，请求出共有多少种可能。-8* 8 chess board put eight queens, so that between them can not attack each other. That any two of the Queen can not in the same row, same column or the same diagonal. The following is a possible, request the total number of species may be.