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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.

955063 puzzles downloaded.

      8       5 7       12   11
    3   13   8 2           1  
      10 12       11   4       5
8             12 1 14       5  
  13 9     3                 1
  11 12     9   13 4 8   2     15
3 4 11     6       12 10     15 14
    15   9 13       1 8   2    
2 14     1 15       5     9 4 12
15     2   8 6 14   13     3 7  
13                 7     15 10  
  7       12 4 3             9
10       11   9       3 7      
  8           1 3   6   4    
1   2       5 10       8      
Showing puzzle number: 5477
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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