Langer's Sudoku Assistant

Invalid Sudoku!

Column 3 is invalid. The bottom left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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