*-----------*
|...|.59|.31|
|65.|...|...|
|3.8|.6.|...|
|---+---+---|
|4..|72.|.6.|
|1..|...|..3|
|.8.|.35|..9|
|---+---+---|
|...|.1.|8.7|
|...|...|.46|
|56.|38.|...|
*-----------*