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Sudoku puzzles (Su Doku)

My database includes 6913752 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. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

129559124 puzzles downloaded.

    6     8 5 1  
5                
  2       1   4  
    1       7    
      6   4      
  6     1   8   2
      7 3        
              3 6
    8 5          
Showing puzzle number: 2367303
Puzzletype: Optimal Sudoku
Startnumbers: 22
Difficulty: Very hard (0)
Solution methods: SiSo SC SB DS DC FI
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