Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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