*-----------*
|...|83.|.52|
|23.|4..|8..|
|9.6|..2|...|
|---+---+---|
|8..|...|.3.|
|..3|.4.|5..|
|.9.|...|..7|
|---+---+---|
|...|1..|7.3|
|..9|..7|.61|
|17.|.63|...|
*-----------*