Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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