Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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