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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.

584000 puzzles downloaded.

  1     2       5      
            8       9  
    2 11                
  12   9       6   11   5
10 6   1   4           9
      7 1 11     3 5    
    5 10     2 8 7      
1           4   2   8 3
3   10   6       9   1  
                6 8    
  7       3            
      12       5     10  
Showing puzzle number: 420
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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