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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.

        10   11          
5   11                 9
1 12     11   5       8  
4   7                  
      1 7     5   6    
9   12         1 7 3 11 5
8 9 1 3 2         5   4
    2   9     12 8      
                  10   6
  2       1   6     3 11
7                 4   1
          11   2        
Showing puzzle number: 450
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Very easy (0)
Solution methods: SiSo SC
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