Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 8 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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