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Sudoku puzzles irregular and disjoint groups (Su Doku)

My database includes 131 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 6. The cells with the same color must also contain the digits 1 through 9. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

114304 puzzles downloaded.

5 3   4          
    4            
      9         1
                4
9 4   6   8   5 2
3                
1         3      
            1    
          4   6 5
Showing puzzle number: 2
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Very easy (0)
Solution methods: SiSo SC
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