Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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