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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.

654801 puzzles downloaded.

11       1   3          
    5     9            
  12   6     7 10   5    
    3 12       2 6 11    
4   7   3   5 11        
    6   10         1   3
5   1         6   7    
        8 1   7   6   2
    4 7 9       5 2    
    9   11 3     7   12  
            12     4    
          10   1       5
Showing puzzle number: 1000
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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