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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.

        9     7   4 2 12
            9         3
  9   1   3   6 10   7 8
          9 12          
    8               10  
3     7   1       8    
    1       7   11     5
  4               2    
          2 6          
9 2   12 11   10   6   4  
12         7            
6 5 9   4     11        
Showing puzzle number: 37
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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