*-----------*
|..1|..7|..8|
|6..|5..|...|
|...|...|19.|
|---+---+---|
|4.3|1..|58.|
|1..|7.8|..3|
|.58|..4|7.2|
|---+---+---|
|.26|...|...|
|...|..6|..9|
|3..|4..|6..|
*-----------*