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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.

878086 puzzles downloaded.

  4   9       15 7         12  
          12 2     5 6     4  
11       12       3 4   13 9   15
10 3       8       7 13   5    
14 2     13     11       8 1   12
5     11 8     14     10        
      14   7     5     12 10 2 6
    2 6     11 1 10     5 15    
4 7 5 13     12     6   9      
        1     12     3 4     2
3   6 12       8     1     14 10
    11   14 4       13       5 8
2   10 15   1 3       12       14
  14     5 11     4 8          
  9         15 10       3   7  
Showing puzzle number: 10898
Puzzletype: Symmetrical Sudoku
Startnumbers: 91
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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