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.

 

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

 

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