Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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