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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.

524455 puzzles downloaded.

    3 10       7     6  
1             6 3 7 8  
2 11       6 9       5 8
          12       3    
      7 6     1 9      
        11       2      
      8       4        
      2 10     11 12      
    9       3          
11 6       8 7       12 4
  2 4 5 9             3
  12     4       8 11    
Showing puzzle number: 644
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Very easy (0)
Solution methods: SiSo SC
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