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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.

520173 puzzles downloaded.

            9   6 12   4
        2     4     10  
  1     8 7     2      
6               3 7    
    9           4 5 8  
10         4 12 1       8
4       6 12 2         7
  5 7 2           11    
    4 9               10
      3     7 5     12  
  8     12     9        
1   10 5   6            
Showing puzzle number: 986
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Very easy (0)
Solution methods: SiSo SC
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