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Sudoku puzzles (Su Doku)

My database includes 10934 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x4 box contains the digits 1 through 12. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

1394158 puzzles downloaded.

      6 9     10   8    
  9 12         3 5      
    10 2     4 7   9   1
        7 5       3    
  10             11      
  5 7 4 3 11 10     1 8  
  11 3     6 7 5 9 12 4  
      9             1  
    4       9 12        
1   11   4 3     7 6    
      3 11         2 10  
    6   2     1 8      
Showing puzzle number: 3327
Puzzletype: Symmetrical Sudoku
Startnumbers: 54
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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