Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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