Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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