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Sudoku puzzles irregular (Su Doku)

My database includes 18345 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 9. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

979077 puzzles downloaded.

      1         3
  5   3       1  
        5 1     7
                4
    6   2   8    
9                
5     8 6        
  7       9   2  
6         7      
Showing puzzle number: 6942
Puzzletype: Symmetrical Sudoku
Startnumbers: 21
Difficulty: Medium (0)
Solution methods: SiSo SC SB DS
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