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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.

    12 8     6 10   3    
  2 1 5     7          
3   11   8     2        
12   9         6     1 5
11   3       5 4        
1     6 10     9   4 3 7
7 3 5   4     8 9     10
        3 2       12   4
9 12     5         8   3
        7     11   5   1
          4     7 11 10  
    7   12 8     3 6    
Showing puzzle number: 1654
Puzzletype: Symmetrical Sudoku
Startnumbers: 58
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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