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Sudoku puzzles irregular (Su Doku)

My database includes 15 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every box contains the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

215577 puzzles downloaded.

15 9             13       5 14 7  
    3     7       2           4
    10       3           13     2
  2           1       10     11  
      5   3     6 1 16 2     13 9
  4 9 12         10   15     16   5
    14 10 13     7       8 9      
    4 11   2   10   3 1     6    
    16     15 4   9   10   6 12    
      8 16       2     12 3 5    
9   5     13   8         4 10 6  
14 12     8 5 11 2     9   16      
  13     12       8           15  
4     6           9       13    
2           10       13     4    
  5 1 3       15             16 7
Showing puzzle number: 15
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Very easy (0)
Solution methods: SiSo SC
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