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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.

    11 5         9      
    3     11   8     12  
  9     8   11       1  
  4       12     3 10 11 6
      11           6 5 2
  3       5            
            10       8  
2 12 7           11      
4 11 10 2     9       6  
  8       10   11     9  
  2     6   4     8    
      4         1 3    
Showing puzzle number: 978
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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