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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.

    3             1     7 15 6
  1   2 8 15   7 5   4     9 12
    6   5 3 11 10              
  14   8 15   9 3     13   11 12  
  3 1   4       14     8   5  
6   13       1           4    
  13 9   11   8 1 15 14       4  
8           10   2           3
  2       5 3 6 9   15   13 1  
    4           6       12   7
  8   7     2       6   15 10  
  5 10   6     9 13   1 3   11  
              8 1 9 5   14    
14 7     3   4 15   12 9 13   8  
11 12 8     14             6    
Showing puzzle number: 3549
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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