Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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