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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.

893492 puzzles downloaded.

    4       9     2       12  
9 10     13       11 14 5       2
        3 1     10   14   4    
  11   5         1   8 2   6 14
  6   7       2 9   13     4  
12   2 10         14 8 7     15  
          14     3     15 6 9 10
14       10 5       13 12       7
3 1 15 11     8     10          
  5     15 9 7         4 14   12
  13     14   12 3       1   5  
11 9   6 7   14         13   2  
    6   5   1     12 15        
10       11 8 15       2     14 4
  14       4     7       11    
Showing puzzle number: 3364
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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