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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.

681799 puzzles downloaded.

  5 2             1   6
    12       1 10 8      
10 8           4        
4                      
  7     10       4   9 5
    9 5             7  
  4             5 6    
2 12   6       11     5  
                      1
        5           6 3
      10 4 6       12    
12   1             8 11  
Showing puzzle number: 706
Puzzletype: Symmetrical Sudoku
Startnumbers: 40
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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