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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.

951374 puzzles downloaded.

    8         10 5   14        
  7 10     15 11 1         8 3 12
5   6   15 14     13   11 9   2  
        7     5   14   11   8  
4             6       10      
15 3   12     8 7 9         6  
            9       3   15 13  
13 2   14 6           8 5   10 7
  9 15   1       14            
  10         5 4 8     2   9 3
      4       12             5
  14   7   2   9     6        
  5   9 4   6     1 7   2   10
8 15 2         11 4 9     12 14  
        14   12 15         11    
Showing puzzle number: 5431
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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