Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 6 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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