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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.

    2   6 12     4 5    
6       11   4       7 9
5   3   7         12   6
          6 7   3 11 12  
        4     1        
8   11 7   3       4   10
11   5       6   1 8   4
        1     4        
  1 12 6   9 8          
7   4         12   10   2
9 3       7   6       11
    1 2     10 9   7    
Showing puzzle number: 488
Puzzletype: Symmetrical Sudoku
Startnumbers: 56
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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