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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.

1341434 puzzles downloaded.

5   7 4 11       6   3  
8 10     7 3            
3 2 11     6   10   1   5
        3     11 9      
11           2 5   6   7
    5 7         8      
      3         5 10    
9   4   8 2           6
      12 5     9        
2   9   10   12     5 6 3
            9 7     2 8
  4   6       8 10 7   9
Showing puzzle number: 5178
Puzzletype: Symmetrical Sudoku
Startnumbers: 56
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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