*-----------*
|..8|...|...|
|..2|.39|...|
|.19|874|...|
|---+---+---|
|89.|...|2..|
|6.3|.2.|5.4|
|..1|...|.73|
|---+---+---|
|...|695|42.|
|...|48.|9..|
|...|...|7..|
*-----------*