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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.

397881 puzzles downloaded.

    12 9     10 15 14 8 4 16 13 5   11
7   10         9 1   6 2 4 16    
4 12 11     14 7     16   6     3  
      5 4 12 8       1   16 13    
  5 15   13     12         7   2 6
16 15 8 14       10 7   13 4        
14 3         4 1 13   5   6 11 9 12
  11   16 3     13     15 1 2   14 8
13 8   15 11 2     9     12 5   1  
1 10 3 2   6   7 8 15         16 14
        7 11   8 2       9 10 4 1
12 9   4         16     11   7 13  
    5 10   13       7 2 9 14      
  1     16   11     3 14     15 10 4
    14 3 2 15   5 11         9   16
8   9 1 10 16 6 4 5 11     15 2    
Showing puzzle number: 2569
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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