*-----------*
|.14|...|...|
|.7.|.32|.5.|
|..2|9.6|...|
|---+---+---|
|..1|.2.|...|
|..5|7.8|3..|
|...|.4.|7..|
|---+---+---|
|...|5.4|6..|
|.6.|37.|.9.|
|...|...|51.|
*-----------*