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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.

160871 puzzles downloaded.

  5              
                 
2 4             5
  2         1 9  
  7   9   6   1  
  9 4         3  
4             8 1
                 
              7  
Showing puzzle number: 50
Puzzletype: Symmetrical Sudoku
Startnumbers: 18
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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