sudokuHard.dat

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sudokuHard.dat

param given default 0:

               1 2 3 4 5 6 7 8 9 :=
           1   2 . 4 . . . . 5 .
           2   . 9 . . . 8 . . .
           3   8 . . 1 . . . 2 .
           4   . . 7 3 6 . . 8 .
           5   . . 8 . . . 2 . .
           6   . 3 . . 2 1 7 . .
           7   . 8 . . . 3 . . 4
           8   . . . 5 . . . 6 .
           9   . 4 . . . . 8 . 5 ;