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Sudoku puzzles (Su Doku)

My database includes 12449 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x5 box contains the digits 1 through 15. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

955063 puzzles downloaded.

    2     14   1   10     13    
    9 3   6 12                
    6   14       13   7     2 10
  7         5     9   2 8 14  
11     13       3 10       1   15
  14     15         2 11 10 12 7  
    3         14   11 8 15   12  
  2   15     9   12     5   1  
  5   1 4 15   8         11    
  1 12 8 13 3         15     5  
15   14       7 5       1     8
  4 5 9   8     1         3  
9 12     7   8       2   10    
                9 3   7 4    
    4     13   11   15     6    
Showing puzzle number: 7816
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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