Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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