
4 0 0  0 9 0  0 0 0
0 0 2  3 0 0  0 6 0
0 8 0  0 0 0  5 0 0

0 0 0  0 0 0  0 0 9
0 5 0  0 2 0  7 0 0
0 0 1  4 0 0  0 3 0

0 0 6  0 5 0  0 0 1
3 0 0  9 0 0  8 0 0
0 0 0  0 0 7  0 2 0

extreme #552
solved w/multiple KeyCells
