Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 1 is invalid. The bottom left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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