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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.

576222 puzzles downloaded.

    7 12         6      
  5     2              
3   10 6   12            
    1               10 7
      9       1     6  
6 12         11 4     9  
  4     11 7         3 5
  10     1       12      
8 3               10    
            5   1 6   12
              6     11  
      3         2 1    
Showing puzzle number: 436
Puzzletype: Symmetrical Sudoku
Startnumbers: 40
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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