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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.

605302 puzzles downloaded.

8 14   6     3   5 13   9 7 4 2
    12   15     11 2   13     3  
  2   1 3   8         5      
2       1 9   3   6 14   10 11 13
    8                 1 4    
            4   7       9 6  
  10 1 7   12 6           3    
14 8       7 2   10 4       1 11
    11           3 14   7 5 10  
  9 6       11   4            
    14 13                 15    
5 3 15   2 13   1   7 9       6
      4         15   10 14   13  
  6     12   14 2     7   8    
3 1 5 14   11 9   13     15   2 4
Showing puzzle number: 5557
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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