*-----------*
|...|...|3.1|
|2.6|9.3|.45|
|...|4.1|..7|
|---+---+---|
|.65|..2|...|
|9..|...|..6|
|...|6..|23.|
|---+---+---|
|8..|2.9|...|
|73.|1.4|6.2|
|6.4|...|...|
*-----------*