Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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