examples/metro-2012-07-13.sudoku


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

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

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