Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

3
6
1
5
7
7
8
2
4
9
8
7
3
2
4
1
6
5
4
2
5
6
    
       
    
    
       
    
3
9
7
6
1
9
6
8
3
4
5
2
8
3
2
7
5
1
7
9
6
5
7
6
    
    
      9
    
    
      9
    
    
      9
8
3
1
2
9
5
1
4
6
7
3
8
6
1
8
5
7
3
2
4
9
7
4
3
    
      6
   9
    
      6
   9
    
      6
   9
1
5
    
      6
   9

 

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