
6 0 4  0 1 0  0 0 0
7 0 0  8 2 0  0 0 4
0 8 0  5 0 4  2 0 0

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

1 0 0  0 0 0  6 2 0
0 9 2  0 0 0  0 7 0
0 0 0  2 0 7  0 0 8

27apr24
...needs one key-cell to solve
logicpuzzles.com level 4 (diabolical)
