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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.

399560 puzzles downloaded.

4   14         6 16 2 8 10     7  
      13 6   12 3     15       11 8
12       16 14     9       5 6    
8 16     2   9         1     12 15
5     11 15 1   16     12 6 3   10 14
  6   3 8 5   1 10   13   12 7    
1 7   5       13 6 14 9 11   10 16 3
9 10 13 2 5     12   4   14   3 6  
  1 5   3   16   2     8 10 13 4 6
13 15 4   7 6 10 2 8       16   5 9
    6 12   16   10 14   1 5 8   9  
2 13   1 10 8     11   14 16 7     12
7 8     11         3   9     1 13
    1 6       14     7 15       11
6 4       15     12 10   7 1      
  14     13 2 5 4 7         11   1
Showing puzzle number: 2354
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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