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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             10     12 7 2  
        10   8       1     9 6
  5 4 6 12   3 1       10 8    
  9   11 15     13              
6         10       7   11     12
8 14   12 2 9   5   11         4
  15   5 9 2     8   14 1 6    
  12   7       15       3   8  
    8 2 3   5     12 11 4   15  
9         15   8   3 6 7   10 2
3     10   4       1         15
              14     4 13   3  
    9 8       4 14   12 2 13 5  
12 6     4       15   7        
  3 5 14     1             4  
Showing puzzle number: 459
Puzzletype: Symmetrical Sudoku
Startnumbers: 91
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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