is this a hack or a mistake or just luck

Chess: Matheus_ELO vs Lemongamerchess - 6429918597 - Chess.com move im talking about is that big one with the bishop near the end

Which move? 

What exactly are you talking about, no illegal moves were made and accuracy was low, so no hacks, I think you just didn't look at the bishops at all. If this was sarcastic please disregard.

ok

:°