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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.

    3   13 8       1 10     6  
1   14     7     15   13 4      
  4         11 10   9     15    
      6   2   13       3 4 9  
3 11   8 5 4         14       13
    2   1         15   7     12
    11 10     12   8   7 2   3  
2                           4
  5   13 6   7   14     12 9    
5     3   12         2   6    
15       11         10 3 13   12 1
  1 4 14       5   13   11      
    8     15   14 7         13  
      5 7   13     12     3   14
  3     14 6       2 4   7    
Showing puzzle number: 2716
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Very easy (0)
Solution methods: SiSo SC
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