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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.

349571 puzzles downloaded.

8         7      
          3   2  
1     9     8    
      5     2    
2   7       5   6
    9     6      
    4     5     3
  5   4          
      6         4
Showing puzzle number: 64522
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Super easy (0)
Solution methods: SiSo
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