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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.

5   8 16           13 11 15 4     1
  16 5   10   15     9 8   3   4 7
3 4 9     7     15 2 6   14   12  
    11   3   4 15 1   16 9 7 8   12
11 12   14 2   7     15 1 10 9   16 6
      9   15   10 12   5       6 3
  15 10       9 14 7 3       11    
12 8   7 4   14     1 15     2    
    3     1 8     5   6 12   2 13
    7       5 1 9 12       3 10  
15 5       6   8 13   12   1      
6 2   12 14 3 10     7   8 5   13 15
4   2 3 12 9   13 16 8   7   6    
  7   13   2 16 4     3     9 15 14
8 3   15   14 6     16   2   1 9  
7     4 1 5 11           16 13   9
Showing puzzle number: 333
Puzzletype: Symmetrical Sudoku
Startnumbers: 138
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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