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Sudoku puzzles disjoint groups (Su Doku)

My database includes 67954 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. 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.

361057 puzzles downloaded.

  4       5 1    
1 2       9   7  
    6       5    
  8     7        
7               3
        4     8  
    7       2    
  3   5       4 7
    8 4       9  
Showing puzzle number: 57544
Puzzletype: Symmetrical Sudoku
Startnumbers: 24
Difficulty: Very easy (0)
Solution methods: SiSo SC
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