examples/metro-2013-04-19.sudoku


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

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

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