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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.

505425 puzzles downloaded.

4       12 10           3
8 11                    
5       9              
10     11   7   6   8    
    7   8   5       2  
2 10   6     11          
          1     4   11 6
  1       3   9   5    
    1   5   7   10     4
              12       2
                    9 5
6           1 5       12
Showing puzzle number: 669
Puzzletype: Symmetrical Sudoku
Startnumbers: 42
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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