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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.

        6 7   12        
4 3             8 2 6 12
8               5   3  
        8           5  
9       3 6   10     4 7
                4 3 10  
  1 9 4                
12 4     11   8 7       10
  11           2        
  10   6               11
2 5 6 9             7 4
        7   3 8        
Showing puzzle number: 512
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Very easy (0)
Solution methods: SiSo SC
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