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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.

616883 puzzles downloaded.

12 3         9 10 8     13      
1 15   8 13 14 7       2 6      
          2     3     1   12 4
4 1 13     11       9 6       8
  5       3     2     9 15    
      12   6     10     14   1  
    14   4       5         8  
3     7     15 14 9     2     13
  9         6       5   1    
  13   6     10     14   15      
    9 2     11     13       3  
10       3 8       2     14 6 12
7 12   14     8     6          
      3 9       14 7 8 4   15 6
      1     2 12 4         7 14
Showing puzzle number: 8741
Puzzletype: Symmetrical Sudoku
Startnumbers: 87
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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