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.

 

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

 

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