Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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