Sure, playing chess needs intelligence, dedication, and good chess players are smarter than an average person. But it’s waaaay exaggerated in movies. I’m a math researcher, and in any movie, my department will be full of chess geniuses. But in reality, only about 10% of them even play chess.
I mean, yes. Any game with only a small number of possible moves can be solved with brute force trial and error.
All unsolved games must have a “sufficient amount of positions” that brute force isn’t an option, and enough complexity that there’s not a cute maths trick to solve it despite the number of moves.
Chess is one of these unsolved games.