核心算法，也即是判断两个方块是否可以消除（通路）。连连看的规则比较简单，能消掉的状况可以用枚举法，不外乎以下三种情况。也即是
1.直线
2.一折（一个拐角）
3.二折（两个拐角）(Core algorithm, that is, to determine whether the two squares can be removed (access). Lianliankan simple rules, can eliminate the situation can use enumeration method, nothing more than the following three cases. That is
1. straight line
2., ninety percent off (a corner)
3., eighty percent off (two corners))