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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.

    9       7   6 12    
        9       8      
6 4   11     12       10  
    2       5 11        
    1     11 3   2 4    
5     4           3   11
4   6           12     8
    11 1   3 4     2    
        3 5       1    
  6       1     3   12 5
      6       1        
    5 9   4       10    
Showing puzzle number: 722
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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