从八皇后的例子看出搜速深度有限,仅有几层,而且不可能出现重复状态的问题,因此BACKTRACK过程完全适用,对于八数码问题则不然,必须设置深度范围限制及出现重复状态引起的死循环这两个回溯点.

-Examples of Queen' s from eight to see the depth of search speed is limited, only few, but can not state the problem of duplication, so the process is fully applicable to BACKTRACK, for eight is not a digital problem, you must set the depth limit and the state caused by duplication death cycle of the two back points.