examples/metro-2012-08-03.sudoku


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

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

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