Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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