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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.

    8 1     11          
3   12   1   7 8     2  
    11 10 5             9
5 1   8     2   9   4  
    4               3  
9 6       7 4 10   12    
    1   9 6 5       7 12
  10               6    
  3   7   8     2   11 5
1             6 11 2    
  11     2 3   1   9   8
          5     7 4    
Showing puzzle number: 7880
Puzzletype: Symmetrical Sudoku
Startnumbers: 54
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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