Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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