Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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