问题的提出：八皇后是个古老而有趣的游戏，是由高斯于1850年首先提出的。

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。试问有多少种放法？-The problem: the eight queens is an old and interesting game, is first proposed by Gauss in 1850.

To place eight Queen on the chess board so that it can not attack each other, that any two of the Queen s not in the board on the same line, same column and with a diagonal. How how many put?