Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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