八皇后游戏的说明：

　　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？

　　基本思想是：先把皇后放在（0，0）位置，然后把1号皇后放在（1，j）位置，

使其满足要求。接着放2号皇后，依此类推。遇到某个皇后如把她无论放在该行的任意

位置均不满足要求，则前一个皇后放置不当，须重新放置前一皇后，如8个皇后均按要

求放置好，这就是一次成功的摆法。-Queen s descr iption of the eight games:



Of the problem: the eight Queen s is the oldest and interesting games, by Gauss in 1850 first proposed.



Requirements in the international chess board to place eight of the Queen, making it unable to attack each other, that is, any two can not be at Queen s



Board of the same line, same column and on the same diagonal. How many types of release law?



The basic idea is: first Queen s on (0,0) position, then placed on the 1st Queen s (1, j) position,



To meet the requirements. Then put on the 2nd Queen s, and so on. Such as a Queen s encountered her on the line regardless of the arbitrary



Location does not meet the requirements, then placed before a Queen s improper to be re-placed the previous Queen, as Queen s are to be 8



Place for good, that is, before a successful method.