Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 5 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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