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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.

752371 puzzles downloaded.

      10         11      
              12       10
  11 12       1 10 3     9
12 7         4 3        
            8   5 12 4  
        12       1     2
8     11       6        
  12 6 5   7            
        4 6         1 11
6     4 8 1       2 9  
5       3              
      2         7      
Showing puzzle number: 67
Puzzletype: Symmetrical Sudoku
Startnumbers: 42
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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