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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.

641641 puzzles downloaded.

12 4         3   6   10 1
  7     10     8        
9   11 6           3    
    1         4        
        1     12   4    
    7 3       6   10 1  
  5 2   12       9 6    
    5   4     3        
        2         12    
    3           1 8   6
        9     10     11  
11 8   5   3         9 10
Showing puzzle number: 474
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Very easy (0)
Solution methods: SiSo SC
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