examples/metro-2012-09-03.sudoku


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

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

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