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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.

1106227 puzzles downloaded.

10 12       4 8   9 5    
8 7         6     11    
  6 2 5     3       8  
11   4     12   9 3   5  
5 2             8   11  
        8       4     7
12     9       1        
  11   6             9 10
  1   2 11   9     12   8
  5       8     7 4 2  
    7     9         10 11
    6 4   7 11       1 9
Showing puzzle number: 7145
Puzzletype: Symmetrical Sudoku
Startnumbers: 56
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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