八皇后问题是一个古老而著名的问题。该问题是十九世纪著名的数学家高斯1850年提出：在8×8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，问有多少种摆法。-Eight queens problem is an ancient and well-known problem. The problem is that the nineteenth century the famous mathematician Gauss 1850: Under the 8 × 8 grid placed on the eight chess queens, so that it can not attack each other, that any two of the Queen can not in the same row, same column or the same diagonal, asked how many kinds of pendulum method.