examples/metro-2012-06-27.sudoku


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0 0 7  8 0 5  0 0 6
0 5 0  0 6 3  2 4 0
0 2 0  4 0 0  0 5 0

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

5 0 0  7 0 4  0 0 0
8 0 0  0 9 0  0 3 0
3 1 0  5 0 0  0 0 2