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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.

1539699 puzzles downloaded.

            10     8    
  3   4 5 12 7 8   11   10
  7 12 8   6         5  
        4 10 8          
  8     6 9     12 2   11
    9   2       6   8  
  10   2       5   6    
8   11 9     6 10     1  
          11 1 2        
  9         4   5 12 11  
5   3   10 1 11 12 4   6  
    4     8            
Showing puzzle number: 4691
Puzzletype: Symmetrical Sudoku
Startnumbers: 56
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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