马踏棋盘，即从8*8的棋盘中任一点出发，按马的走法走，直至走完整个棋盘，并且每一步不能重复。找出一条走的路线,如不能走,异常.-chessboard horse riding, from 8 * 8 chessboard term point of view, Ma by the law to go until the end of the whole chessboard, and each step be repeated. Go find a route, if we can not go, abnormal.