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.

 

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

 

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