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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.

612330 puzzles downloaded.

8 13   2 1     12 6       3    
9   11   4         7 10   2 12  
  3   7               9   8 15
    5 4     1 2     7        
      15   11 13 8             6
  1     6       4 12   11 5 9  
15         10 9   14 1 2   7    
        13           3        
    2   5 6 7   15 13         4
  8 13 10   4 3       11     1  
6             15 2 9   8      
        2     1 10     5 15    
13 9   6               3   5  
  12 10   11 3         9   8   2
    3       8 9     6 15   4 10
Showing puzzle number: 5247
Puzzletype: Symmetrical Sudoku
Startnumbers: 88
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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