N-Queen solver written in java with excellent Graphical user interface.

n皇后问题可以表示成n-元组(x1,…,xn),其中xi是放在第i行的皇后所在的列号。于是，解空间由nn个n-元组组成。 显示约束条件为Si={1,2,…….,n},1 i  n。 隐式约束条件之一为没有两个xi相同(即任意两个皇后不在同一列上)。将其加入到显式条件中，于是解空间的大小由nn个元组减少到n！个元组。 -n queens problem can be expressed as n-tuple (x1, ..., xn), where xi i

N皇后的递归算法。使用java语言编写。可以在计算机上实现-N Queens of the recursive algorithm. Using java language. Can be implemented on a computer

(This is Java version) The eight queens puzzle is the problem of placing eight chess queens on an 8×8 chessboard so was originally proposed in 1848 by the chess player Max Bezzel, and over the years, many mathematicians, including Gauss, have wo