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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.

368474 puzzles downloaded.

4   3 1   6     2 8   13   15 14 16
7 6   16   10 3   14 2            
  16   3   5 8 15   14 1 6   2 4 7
1   4 5 10         13     14   16  
    15 13     11         7   5 12  
            5 12 13 4 2 10 1 3 9 6
    1   3       7   16 2     15 13
15 12   2 4 9         10 11 16      
      6 2 11         7 1 5   13 8
6 11     14 3   1       8   12    
16 14 13 11 1 4 2 3 12 5            
  1 2   11         3     4 16    
  5   4     6         16 13 10   9
2 7 5   15 12 16   10 9 13   6   8  
            14 8   15 6   9   11 12
3 10 12   5   4 13     9   8 6   14
Showing puzzle number: 1506
Puzzletype: Symmetrical Sudoku
Startnumbers: 132
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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