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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.

749271 puzzles downloaded.

          6 4   2      
6     2                
4     9       11       1
  10       3 6 8     5  
  7       5 9   1   4 2
    4           10      
      4           9    
9 1   7   10 8       11  
  3     4 11 12       2  
8       1       12     4
                7     10
      8   2 1          
Showing puzzle number: 215
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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