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.

 

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

 

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