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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.

754870 puzzles downloaded.

7   2   6           3  
1     10 12           6  
  3   1         4   5 12
        7   10         1
5 4   11                
10             3     9  
  5     3             6
                11   1 3
11         10   1        
2 7   4         3   12  
  2           4 10     11
  12           6   4   7
Showing puzzle number: 66
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Harder (0)
Solution methods: SiSo SC SB DC XW
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