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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.

404194 puzzles downloaded.

13 16     3   7 9   10 8 1        
      13 10 9   16         6   5 3
  2     16   12 14 11   10   3 15   6
2 13     12   14   10     5 11 4 7 16
  7 4   9 14     8     16 10 11 3  
      1   16       9 12 14   5    
3   1   6 4 10 11 16 2     5 8 9  
  5 12     7     1 16     15   8 13
10 3   7     1 13     2     12 16  
  1 6 4     2 8 7 12 13 11   14   5
    3   1 12 11       6   2      
  12 16 9 5     1     15 2   10 13  
8 15 7 16 2     4   5   9     6 14
1   13 15   2   5 4 6   3     12  
16 10   14         9   3 8 4      
        8 11 5   2 4   15     14 1
Showing puzzle number: 2344
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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