
8 0 3  0 0 5  0 0 1
0 9 0  0 1 0  0 8 0
1 0 0  4 0 0  3 0 0

0 0 6  0 0 0  0 9 0
4 0 0  0 3 0  0 0 5
0 8 0  0 0 0  7 0 0

0 0 5  0 0 8  0 0 2
0 7 0  0 2 0  0 6 0
2 0 0  9 0 0  4 0 0

hard imposs.
after removing 1 singleton, gives several badXcycle
and goodXcycles...leading to error
I think due to goodXcycles deletables=>I need to better
understand good Xcycles!

lots of nonAlignedBoxDbls(blue)...
do I want to display them?
