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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.

1 9         6 8        
      2 4         10    
  6   5       9   2   8
4           1          
  11           1     9  
5   2           3   6 10
9 3   10           5   4
  5     6           11  
          6           12
8   12   7       1   10  
    9         2 12      
        12 9         7 2
Showing puzzle number: 684
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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