examples/metro-2012-09-28.sudoku


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

0 0 5  9 7 0  0 2 0
7 9 0  0 0 0  6 0 4
0 1 8  0 0 0  0 0 9

0 0 4  0 0 5  9 8 0
0 5 0  0 4 0  0 0 2
1 0 6  0 0 3  0 0 0