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.

 

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

 

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