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Random sudoku puzzle

  8 5   3       9
  3     6     4 2
7     9          
    4       7    
              1  
2   9   7   5 3  
  2       3      
4     7 1        
    8   5        
Showing puzzle number: 4334357
Puzzletype: Optimal Sudoku
Startnumbers: 25
Difficulty: Super hard (175)
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