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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.

698909 puzzles downloaded.

        10 12 5 13   7   1     14
  12 4   6       10     9 5    
5       1 9   6   4       3  
      5             7   8    
    15         5     1 3     2
2 6   1 9 13     3 8     10    
  7 1 4           5 12 10 2    
  14 2     8       3     1 7  
    9 3 8 11           13 6 4  
    5     10 8     1 13 4   14 6
7     14 15     11         9    
    6   13             5      
  11       1   7   13 4       12
    12 10     3       6   7 1  
9     15   6   14 5 12 2        
Showing puzzle number: 3952
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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