*-----------*
|...|.79|..4|
|451|..2|...|
|..9|1..|...|
|---+---+---|
|7.2|...|64.|
|5..|736|..9|
|.68|...|7.5|
|---+---+---|
|...|..8|5..|
|...|5..|978|
|1..|29.|...|
*-----------*