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Sudoku puzzles irregular (Su Doku)

My database includes 1031 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 12. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

565783 puzzles downloaded.

    6 8 1     11        
    3     5 7       1 4
4         6   8     2  
    9 6   4       5    
  4   1 3   2          
  12         3       11  
  6       8         7  
          9   4 10   12  
    4       11   12 3    
  9     2   1         5
5 3       7 10     6    
        6     5 7 2    
Showing puzzle number: 729
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Very easy (0)
Solution methods: SiSo SC
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