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Sudoku puzzles irregular (Su Doku)

My database includes 13110 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.

520600 puzzles downloaded.

    4 2         6
  3     8        
    9         4 2
              3  
4               7
  9              
8 7         3    
        7     9  
1         5 2    
Showing puzzle number: 2979
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Hard (0)
Solution methods: SiSo SC SB DS DC
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