Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 9 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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