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Sudoku puzzles irregular (Su Doku)

My database includes 1031 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every box contains the digits 1 through 12. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

751947 puzzles downloaded.

    12 2   5         10  
      3   1         6  
          4     3   5  
  4     12   10         2
3       10 9       12    
8   11             10   12
5   1             3   6
    2       12 9       5
6         3   7     8  
  10   5     4          
  12         2   8      
  5         6   9 7    
Showing puzzle number: 673
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Very easy (0)
Solution methods: SiSo SC
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