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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.

719712 puzzles downloaded.

    6 7   5 8 1   12    
9 7   4 8              
12           2         10
  5 9             8    
1     12 4         10    
          6     8 9 2 5
3 10 7 11     5          
    2         12 7     8
    10             11 3  
5         10           9
              6 10   12 4
    3   6 2 9   12 7    
Showing puzzle number: 234
Puzzletype: Symmetrical Sudoku
Startnumbers: 50
Difficulty: Very easy (0)
Solution methods: SiSo SC
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