Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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