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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.

628400 puzzles downloaded.

    2         9       5
            12   2   9 1
      1         10      
      8     2         4
5         4 11   1      
3 5     9     4     6  
  10     12     2     5 11
      6   10 5         7
11         9     3      
      3         12      
1 7   12   6            
10       11         3    
Showing puzzle number: 245
Puzzletype: Symmetrical Sudoku
Startnumbers: 42
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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