Squares separated by a wall are not adjacent unless only a corner is between them.

被墙分隔两边的方格不算是紧邻方格，除非该墙仅是一个墙角。

youdao

Squares separated by a wall are not adjacent unless only a corner is between them.

被墙分隔两边的方格不算是紧邻方格，除非该墙仅是一个墙角。

youdao