Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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