Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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