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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.

374644 puzzles downloaded.

    10 2 6 5           8 7 11  
3 14               1   10     6
4       13   6 10 11       1   2
        4         15   5   2  
  1       2 7 4   6   3   9  
6     13 3   9 5 8   11        
    14   8   13     4       5 15
15           5   2           11
7 5       12     6   1   10    
        14   1 12 5   3 15     7
  6   11   13   3 4 10       8  
  4   3   8         14        
10   12       2 6 9   13       8
11     15   4               1 10
  13 4 14           11 6 2 3    
Showing puzzle number: 4517
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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