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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.

756740 puzzles downloaded.

          1       10   8
  3   12 8              
8     9 3 5       12   2
  2   6         4      
5   1   9 11   4        
7   4     2     8      
      8     2     7   9
        1   9 11   5   4
      11         9   3  
3   9       1 12 2     11
              3 6   1  
4   3       5          
Showing puzzle number: 427
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Very easy (0)
Solution methods: SiSo SC
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