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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.

831222 puzzles downloaded.

      5       13           15 6
2     6 3 12       11   4 8   7
13                 2 12 3 11    
      13     8 5     14   15   10
    3       7     15   2 12 4 13
      10 4 6     12 14     5 9  
  2   3 1 4       9 15   13    
  4           11           1  
    15   8 7       1 5 9   3  
  12 6     13 1     4 11 15      
3 13 9 14   5     15       2    
1   11   5     3 14     8      
    5 1 14 11                 9
7   13 15   9       5 4 10     11
12 6           8       5      
Showing puzzle number: 10990
Puzzletype: Symmetrical Sudoku
Startnumbers: 91
Difficulty: Very easy (0)
Solution methods: SiSo SC
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