Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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