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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.

479001 puzzles downloaded.

      12 5     11        
      11     7       6  
5 10 9 7       3 1      
      8     2     10    
  1     6             8
11 8       2     3 4    
    5 4     6       10 3
9             2     5  
    1     10     8      
      2 11       4 5 9 1
  5       1     11      
        12     1 5      
Showing puzzle number: 462
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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