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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.

869875 puzzles downloaded.

13     1 7         6       10  
  9 8   2   10   7 1       5 15
  10       12 2           13 4  
        4 11 1     9   15 12   8
10   13     3 7                
9   12       13 14   4 3 5   11  
      3 12           9   10 14  
1   10         5         8   13
  5 15   9           1 2      
  3   12 10 1   15 13       11   14
                3 8     1   6
6   5 4   2     11 10 8        
  6 14           2 11       9  
12 2       8 14   1   7   15 3  
  13       10         12 14     2
Showing puzzle number: 4853
Puzzletype: Symmetrical Sudoku
Startnumbers: 89
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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