Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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