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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.

2316446 puzzles downloaded.

6 4   8 12 5           11
  1   9   2 3          
      12 9     8 6   5  
  9   2 5 8     11   4  
12   6         1     3  
  10 4       7          
          12       6 7  
  8     10         2   3
  6   3     9 4 10   12  
  2   5 1     9 3      
          7 8   4   10  
11           6 2 5   1 9
Showing puzzle number: 6643
Puzzletype: Symmetrical Sudoku
Startnumbers: 56
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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