Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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