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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.

664826 puzzles downloaded.

  9 6   12 5   7   2     15 3  
            9             4  
  14 3       11       1 5 9   12
12         11   5   8   6      
  3     5     10     7     11 15
  6 7 14     12   13   10     5  
11             2 6 12   4   14 9
        9 10   1   4 6        
4 13   2   9 5 11             1
  7     15   4   2     10 14 12  
3 12     14     9     15     6  
      5   3   14   1         7
1   14 3 13       7       11 8  
  11             4            
  8 4     14   13   15 3   12 7  
Showing puzzle number: 9471
Puzzletype: Symmetrical Sudoku
Startnumbers: 89
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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