Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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