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.

 

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

 

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