Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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