Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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