*-----------*
|54.|...|...|
|..9|6.5|8..|
|68.|..9|3..|
|---+---+---|
|...|..3|.8.|
|.32|.8.|76.|
|.7.|2..|...|
|---+---+---|
|..6|8..|.74|
|..4|1.6|9..|
|...|...|.25|
*-----------*