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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.

    8   4     11 5   1  
    3 2     11 1        
9     1 12         3   4
        1 3   4 2      
1 5     9   2   12      
  2 1         10   8    
    6   10         4 7  
      10   4   5     2 1
      6 5   9 3        
12   5         2 3     11
        2 11     6 7    
  6   4 3     8   5    
Showing puzzle number: 556
Puzzletype: Symmetrical Sudoku
Startnumbers: 54
Difficulty: Super easy (0)
Solution methods: SiSo
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