Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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