Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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