Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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