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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.

756740 puzzles downloaded.

5               9 11    
  12         10 5 8 4   9
      10         3      
        11 2       7    
  6       12   4     10 7
        5             2
9             1        
8 1     10   12       11  
    12       2 9        
      8         11      
7   10 1 9 4         2  
    2 4               10
Showing puzzle number: 307
Puzzletype: Symmetrical Sudoku
Startnumbers: 42
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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