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Sudoku puzzles (Su Doku)

My database includes 2967 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row and every column contains the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

398063 puzzles downloaded.

      11 5 1   12 6 13 16 8 15     4
    11   9 13   15     1     7 5 6
11 12 5           7         3 6 9
      8 11       10       5     7
  10     16       2 14   9   11 7 3
  13 15   7     8 16   5 6   1 11  
10 7 4 15     2 9   8     12     16
8 1 10 2   12     5   4   3 14    
    8 4   10   13     15   7 12 16 5
9     14     6   15 16     2 8 10 12
  6 9   13 8   1 4     7   10 3  
2 14 6   3   15 16       13     12  
15     9       3       2 1      
5 16 7         14           4 2 8
6 4 13     16     3   7 5   9    
16     1 12 2 8 7 11   3 10 6      
Showing puzzle number: 364
Puzzletype: Symmetrical Sudoku
Startnumbers: 130
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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