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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.

688857 puzzles downloaded.

4       11       8 10 14 3 12    
      1 12     15           13 8
    5     4 7           1    
14           11   3   1     2 6
1   15     8     4   5       10
6 9       14 10 1       11      
15     5 10 7 13   14     4 11 3  
    9   8     11     10   6    
  6 12 3     5   10 9 15 2     7
      4       2 6 1       9 3
12       2   3     11     5   13
3 10     7   8   13           4
    3           11 4     7    
2 5           7     4 8      
    4 10 1 2 6       3       11
Showing puzzle number: 7568
Puzzletype: Symmetrical Sudoku
Startnumbers: 91
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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