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

0 0 0  4 0 0  0 0 0
0 6 0  0 0 7  1 0 0
5 0 0  0 8 0  0 0 9

4 0 0  0 1 0  7 0 0
0 0 2  0 0 5  0 0 0
0 0 0  6 0 0  0 3 0

extreme/unsolvable #557
6sep23

