八皇后问题:在8行8列的棋盘上放置8个皇后，使任一个皇后都不能吃掉其他的7个皇后,即没有任何两个皇后被放置在棋盘的同一行、同一列或同一斜线上。-8 Queen s problem: In line 8 of 8 chessboard placed 8 Queen s, so that one of Queen s can not eat the other 7 s, that is, no two Queens were placed in the chessboard of the same