*-----------*
|.36|...|8..|
|...|.4.|9..|
|2..|8.5|.6.|
|---+---+---|
|845|3..|...|
|...|7.1|...|
|...|..8|253|
|---+---+---|
|.7.|9.2|..6|
|..3|.6.|...|
|..8|...|49.|
*-----------*