Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Go back and make a different choice.

 

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

 

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