八皇后问题是大数学家高斯于1850年提出来的。该问题是在8×8的国际象棋棋盘上放置8个皇后，使得没有一个皇后能"吃掉"任何其他一个皇后，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。要求编一个程序求出该问题的所有解。骑士游历问题是放在8×8的国际象棋棋盘上的一个马，按照马走"日"字的规则是否能够不重复地走遍棋盘的每个格。要求编一个程序求出该问题的一个解。-Eight Queen s question is the main mathematician Gauss was put forward in 1850. The problem is in the 8 × 8 chess board to place eight queen, making no one s able to　eat　any other a queen, that is, no two queen was placed in the chessboard of the same line, the same row or the same oblique online. Asked for a procedure to derive all the solutions of the problem. The problem is Cavalier traveled on 8 × 8 chess board on a horse, in accordance with the horse to the　Day　of the rules of the word can not be repeated for each cell traveled chessboard. Asked for a procedure to derive a solution of the problem.