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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.

737679 puzzles downloaded.

4 13       7         5       6
8 11 1     3   10 9         12  
  9   3 5             11     15
7     14     6       13       11
  8 10       11 13   12   9   1  
9   13     15     4   3 12   8  
        7     5 11   1 15      
    12 5   10 1   7 13   6 4    
      6 15   9 14     7        
  3   10 12   7     15     1   4
  6   7   4   12 1       10 5  
1       8       6     7     2
5     8             14 10   6  
  4         14 6   8     13 7 5
10       13         7       4 1
Showing puzzle number: 6538
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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