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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.

711170 puzzles downloaded.

12   10 4           7    
2       7     12   11    
  6   8   12 9         4
8       2   12 4        
    2       6          
  4   6   3 5       12  
  7       11 1   9   10  
          9       3    
        12 2   5       3
5         4 2   10   7  
    11   9     6       10
    12           1 4   11
Showing puzzle number: 42
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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