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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.

531909 puzzles downloaded.

            8 5 1 11    
  10     1   12     9    
  11   8 7     3        
  4   5 11   7     2 10  
  1     12   10 6 4   8  
    8           10     11
9     7           6    
  3   4 10 11   9     7  
  6 11     4   12 8   2  
        5     11 6   3  
    1     6   10     5  
    6 9 8 12            
Showing puzzle number: 250
Puzzletype: Symmetrical Sudoku
Startnumbers: 54
Difficulty: Super easy (0)
Solution methods: SiSo
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