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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.

756740 puzzles downloaded.

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