*-----------*
|...|8.7|...|
|4..|.26|..5|
|2..|13.|4..|
|---+---+---|
|.7.|...|3..|
|6.3|5.9|1.8|
|..2|...|.6.|
|---+---+---|
|..5|.98|..2|
|9..|65.|..3|
|...|3.2|...|
*-----------*