MCTS isn't doing full width search. Not by a longshot. What it's doing is using the computer's ability to randomly test various lines of inquiry many, many ti

MCTS isn't doing full width search. Not by a longshot. What it's doing is using the computer's ability to randomly test various lines of inquiry many, many times faster than a human being can, and then use statistical methods to help rule out the lines that cannot produce anything of value. That's why it's Monte Carlo Tree Search. That said, any sufficiently advanced technology is indistinguishable from magic [0], and with modern Machine Learning techniques we are getting closer to crossing the line over to "magic" in certain fields, such as Chess. [0] Clarke's Third Law, see https://en.wikipedia.org/wiki/Clarke%27s_three_laws https://en.wikipedia.org/wiki/Clarke%27s_three_laws