八皇后问题是一个古老而著名的问题，是回溯算法的典型例题。该问题是十九世纪著名的数学家高斯1850年提出：

在8X8格的国际象棋上摆放八个皇后，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. -Eight queens problem is an old and well-known problem is a typical example backtracking algorithm. The problem is that the famous mathematician Gauss nineteenth century, made in 1850:

In the 8X8 grid on the display 8 chess queen, it can not attack each other, that any two Queens can not at the same line, same column or on the same diagonal.