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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.

371284 puzzles downloaded.

3     8         2
          9 8    
        3        
          8      
4     5          
  1              
9                
  3              
2   7            
Showing puzzle number: 16158
Puzzletype: Optimal Sudoku
Startnumbers: 14
Difficulty: Very hard (0)
Solution methods: SiSo SC SB NS
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