Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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