*-----------*
|..8|.41|9..|
|.5.|8..|.42|
|..6|.2.|...|
|---+---+---|
|9.4|...|.7.|
|3..|457|..8|
|.7.|...|4.6|
|---+---+---|
|...|.7.|6..|
|69.|..5|.2.|
|..2|96.|1..|
*-----------*