马踏棋盘，在一个8*8棋盘中随机制定一个位置，判断是否能遍历整个棋盘，遍历的规则是只能走‘日’，且不能越界-Horse riding board, in an 8* 8 board to develop a random location, to determine whether to traverse the entire board, only to go through the rule is day , and can not be crossed