Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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