examples/metro-2012-06-15.sudoku


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

3 0 0  4 0 1  0 0 0
0 9 0  6 7 0  0 3 8
0 0 5  3 0 0  0 2 0

0 5 8  0 0 6  4 0 0
0 0 9  1 0 0  0 0 0
6 3 1  0 9 0  7 0 0