Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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