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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.

    7 10             12  
  5     3 1         10 9
  4     10 9 12   1 5    
    4     10   6   2    
        2         3 8  
11 6       3         5 7
10 12         3       11 1
  8 5         2        
    11   4   5     10    
    8 4   5 7 3     1  
12 7         6 4     3  
  11             9 7    
Showing puzzle number: 5510
Puzzletype: Symmetrical Sudoku
Startnumbers: 52
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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