Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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