Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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