Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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