Each 3x3 subgroup needs to contain 1-9 as well. If you look at the top-left one in that test:

1 2 3
2 3 1
3 1 2

It fails that criteria.

I'm stuck on the same test.

If I could understand why that is not a valid sudoku solution, I could fix my code accordingly.

It seems valid to me, but obviously it is not lol.

Anyone?

I am also getting the same message.

Expected 'false' on input of
1 2 3 4 5 6 7 8 9
2 3 1 5 6 4 8 9 7
3 1 2 6 4 5 9 7 8
4 5 6 7 8 9 1 2 3
5 6 4 8 9 7 2 3 1
6 4 5 9 7 8 3 1 2
7 8 9 1 2 3 4 5 6
8 9 7 2 3 1 5 6 4
9 7 8 3 1 2 6 4 5

• Expected: false, instead got: true
  why?

I am getting 17 passed and one failed.

"find element not existing in array:,0.6680575974751264"

I have no idea how to fix this .

I got the same mistake,but it passed fine