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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.

754391 puzzles downloaded.

8 5 10       7          
4     7   3     9      
                4     9
        10     11 1 3   5
    6     2           3
  10   3 4       12 5    
    1 8       10 6   2  
9           11     7    
6   2 9 7     1        
3     5                
      10     5   2     7
          11       6 4 2
Showing puzzle number: 663
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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