Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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