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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.

554161 puzzles downloaded.

  1     11             5
    11     12 3     10 4  
  9 10 3 5         7    
      8   6 9     12    
1     6 8 7   5        
        10   7          
          2   8        
        6   11 2 8     1
    1     11 4   10      
    8         11 4 3 10  
  6 9     8 5     1    
10             6     11  
Showing puzzle number: 820
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Very easy (0)
Solution methods: SiSo SC
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