在n×n的棋盘上摆放n个皇后，使其不能互相攻击，即任意两个皇后都不能处于同一行、同一列或同一斜线上。-Placed on board nn n queens, it can not attack each other, that any two queen can not be on the same line, same column or diagonal.

N皇后问题求解工具。能够求解出4—9皇后的所有解，类封装的。图形界面-N Queens problem solving tools. Be able to solve all the solutions of 4-9 Queen of the class package. Graphical interface