Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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