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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.

474013 puzzles downloaded.

12 1       5 9 6 2   3 10
3     9                
  9               6   5
        7 11     10      
8       5 6 4          
      4       2        
        1       9      
          12 5 7       1
      1     6 11        
5   10               11  
                3     4
4 8   6 9 2 10       7 3
Showing puzzle number: 728
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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