Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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