examples/metro-2012-06-20.sudoku


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

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

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