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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.

  15       14 13         11   10  
9 10     14 3 1     11     7   5
  13           4 2     8   12 1
14     10     6 2     5 9   8  
  9     5       4            
        4 9   10     13 15 3    
  6 9             3   1 5 4  
10   1     4   12   6     13   3
  8 4 3   5             6 2  
    6 11 3     15   7 10        
            3       15     1  
  7   9 13     14 1     4     8
11 3   8     12 6           15  
15   14     7     13 5 12     9 4
  4   12         11 1       6  
Showing puzzle number: 8519
Puzzletype: Symmetrical Sudoku
Startnumbers: 89
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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