Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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