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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.

720904 puzzles downloaded.

              8 4   3 1
      4     3          
        1     10     9  
8 10     2         4    
2   11   7 3 8          
7       10 11     6 3 1  
  3 4 2     6 1       11
          4 7 3   8   5
    12         5     10 7
  8     3     6        
          5     2      
6 5   12 11              
Showing puzzle number: 658
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Very easy (0)
Solution methods: SiSo SC
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