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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.

949045 puzzles downloaded.

2   11 1         13     7     4
15 8         7   12     3   14  
    12 3   11   8   6 9        
3     9   7     6 8         5
    8       3   11   4     1  
13 7 15 11       4 5 1     14 9  
  4         8 13   9 7        
11 15     2     1     6     13 3
        10 14   6 3         5  
  1 2     5 9 12       15 10 3 6
  3     8   1   15       9    
9         6 13     2   5     1
        9 2   15   3   8 6    
  14   10     6   1         4 9
8     2     14         10 3   12
Showing puzzle number: 3927
Puzzletype: Symmetrical Sudoku
Startnumbers: 93
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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