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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.

  3   4     7 9   11    
          8       6 11 3
      2                
  6 2   12 7         8  
6   9           2      
  10           1 12   6  
  4   8 10           7  
      9           3   4
  1         9 12   8 4  
                9      
8 9 6       12          
    7   4 10     5   3  
Showing puzzle number: 53
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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