Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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