Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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