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Sudoku puzzles (Su Doku)

My database includes 17735 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. The grey boxes is even numbers and the white boxes is odd. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

265199 puzzles downloaded.

3     4         1
                 
      5   1     2
                 
              1  
    7            
    8     3      
          8      
            4    
Showing puzzle number: 15388
Puzzletype: Optimal Sudoku
Startnumbers: 12
Difficulty: Very hard (0)
Solution methods: SiSo SC XW NS FI
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