*-----------*
|.75|43.|...|
|.39|.1.|65.|
|8..|...|4..|
|---+---+---|
|...|...|.8.|
|298|.5.|367|
|.5.|...|...|
|---+---+---|
|..7|...|..9|
|.41|.2.|73.|
|...|.79|81.|
*-----------*