
things to notice

1) all 4 2x2 blue corners have 2 digits. The remaining 2 cells
	are all from the set {11223344}

2) the empty cells in pink are all from {66778899}

------------------------------------------------------------------
.) 5@93
.) 7@99
.) lower-right block has both its candidate 9s @ 89 & 98
.) lower-left block has both candidate 6s in column 1
	which implies cell 51 has candidates 89 only.

------------------------------------------------------------------

3) a 9@59 => 8@51 => 6@91 => 9@95
	...and this thusly prohibits both 9s in lower right block =><=.
	=> 9@89, 9@95, 6@59, 8@92, 8@15, 8@48, 8@19, 6@17, 5@18, 7@15
		7@31, 5@21, 9@11, 7@74

-----------------------------------------------------------------
.) 89 pair @ 24,26
.) 57 pair @ 47,67
.) 13 pair @ 53,55
-----------------------------------------------------------------

4) 3@25=>1@55=>3@53, alternatively 4@25=>2@29=>1@23=>3@53
	...either way 3@53.  This solves puzzle.


?need select+k to cycle to next candidate if k-key is hit again...
...now it turns OFF the Kcell search...

