Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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