First Input IS present among the tests in C#.
Not resolved. First column has x2 1's.
As of May 13th, 2019: https://gyazo.com/49dfb0cbf5b40bbf0b76d2c7b71b35f1
Made new issue.

Not an issue. First input is not present among the tests, and for the second input the correct output is false.

C# Solution:

Test Failed
Test:
{1, 2, 3, 4, 5, 6, 7, 8, 9}
{7, 3, 5, 8, 1, 9, 6, 4, 2}
{1, 9, 4, 2, 6, 5, 8, 7, 3}
{3, 1, 7, 5, 8, 4, 2, 6, 9}
{6, 5, 9, 1, 7, 2, 4, 3, 8}
{4, 8, 2, 9, 3, 6, 7, 1, 5}
{9, 4, 8, 7, 5, 1, 3, 2, 6}
{5, 6, 1, 4, 2, 3, 9, 8, 7}
{2, 7, 3, 6, 9, 8, 1, 5, 4}
Expected: True
But was: False

The first "column" contains 2 "1" values, so it can't be correct?

{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
But was: True
Shouldn't this be true?