Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 5 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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