If you're playing as white, then the one on the right is yours as the danger markings are on it. Seeing as the ai gets a little buggy when playing as white that's prob the answer.
However the one on the left is lighter in colour than the one on the right as the one on the right is missing the normal fade on pieces. And the red glow on the right one is different from normal.

So my answer is either it’s a trick question, you wouldn’t let an effect mess with telling black from white and they are both black.
Or if one of them is actually meant to be white, it’s the one on the right.