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@wcharczuk
Created August 31, 2015 18:01
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Hard sudoku board
5 3 _ _ 8 _ _ _ 2
7 _ _ 6 _ _ 3 _ _
_ _ 2 3 _ _ 1 _ _
_ _ _ _ _ _ _ _ 3
_ 7 _ 2 _ 5 _ 6 _
1 _ _ _ _ _ _ _ _
_ _ 5 _ _ 7 2 _ _
_ _ 9 _ _ 6 _ _ 7
6 _ _ _ 3 _ _ 9 5
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