*-----------*
|...|..9|.65|
|.7.|.4.|...|
|39.|6..|..2|
|---+---+---|
|..4|7..|...|
|2..|.1.|..6|
|...|..6|3..|
|---+---+---|
|9..|..7|.24|
|...|.2.|.8.|
|54.|1..|...|
*-----------*