Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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