examples/metro-2012-06-01.sudoku


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

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

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