Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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