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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.

942930 puzzles downloaded.

    9   4   7 14   15 10 12 5   6
        12 10     1   9       4
  3 8       9 6 4 12     1    
  15   14     4           6 1 8
  8   11 13       6            
9   6 4   1               7  
  12 11   10 7   3   1   2     5
        3   6   9   1        
8     2   11   15   10 7   3 13  
  13               5   7 10   1
            12       4 6   9  
4 9 10           8     5   2  
    1     6 3 5 2       11 14  
6       9   8     13 3        
5   3 12 11 14   7 10   8   4    
Showing puzzle number: 1973
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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