Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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