Yeah, back in chess club at school, we also got a visit from the local (future) GM as a treat on one of the last days. He took us at something like 15 simultaneous games at once... and beat us all.

Go is slightly different; it only has one piece type, the rules are much simpler than chess, the board is much larger but with 8-fold symmetry, so the first 20-30 moves are likely to fall into some "basic" patterns in some of the octants. By comparison, the patterns in chess get hard to manage after just 10 moves, while Go pros may plan even 100 moves ahead. Where Go gets really complex, is when the patterns start meeting, and the complexity tends towards the 10¹⁷⁰ possible moves, way more than the 10⁴⁰ practical ones in chess.