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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.

709389 puzzles downloaded.

6     12             5 2
    11         1 2 8 10  
2 3   5       8 7      
      3       12        
  11   8               10
  2     4 7   10 9      
      9 3   11 7     2  
5               4   6  
        9       6      
      2 8       3   7 6
  8 5 11 6         2    
3 12             5     1
Showing puzzle number: 504
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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