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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.

8         15 13 2       9      
        5       6   14     15  
      15     3 7 4   1   6   2
11     8 4   10 15     7 14 12 2  
    13     7     2   9       3
7 12         11     9 4 10 15    
        2 13       8 5 1 7 14  
      5       11       4      
  7 11 14 13 6       15 2        
    15 11 7 2     9         4 14
4       9   15     3     13    
  1 6 3 14     10 11   15 2     9
2   12   3   4 6 10     7      
  14     10   5       6        
      7       8 13 12         4
Showing puzzle number: 9993
Puzzletype: Symmetrical Sudoku
Startnumbers: 91
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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