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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.

2333808 puzzles downloaded.

11         12 3     7 6 4
    9 4     1 6   12 3  
5               1      
    10   4   9   3 6    
1     3 10     2 12      
    6     3   1       8
4       3   6     5    
      1 12     11 7     6
    5 2   7   8   3    
      7               9
  1 2   8 5     11 10    
8 11 12     1 2         3
Showing puzzle number: 724
Puzzletype: Symmetrical Sudoku
Startnumbers: 56
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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