It's a personal and subjective decision, whether luck exists. It's a rationalisation of the unknown to some extent. Then again, belief in determinism was always thought by psychologists and psychiatrists to correlate with problems with mental health. Quantum mechanics seems to support the natural interpretation ... that chance is real. For our universe to display pseud-randomness which is really determined but driven by convoluted mechanisms that disguise the deterministic behaviour of fundamental particles would seem to be a very artificial invention, backed up by no evidence at all, and all to suit a few people who can't do mathematics as well as they'd like to or who can't let go of the obsession that they need to be in control.
I have a question. I had to take my car in to have the front end aligned, and a specialist did it, a mechanic. So, given that your comments make no sense (to me) and the answer will probably also make no sense, is there a way to describe what a quantum mechanic is (or does)?
I think the better question is does luck exist at all. if the answer is yes then it probably exists in chess. if the answer is no however, then it probably doesn't.
I agree. If the answer is no, then it "probably" doesn't exist in chess. Of course there is always the small chance that if luck doesn't exist, that it could still exist in chess.