>>16708819He's extremely good at rote memorization. Chess isn't ALL about memorization, but it's very, very helpful of course. When he was a kid he did a task along the lines of: memorize every last village and county in all of Norway, something like that. Several thousand pieces of rote information, something like that.
As others in this thread have intuited in the back and forth between memory and general intelligence, the skills for chess are a very particular, narrow form of intelligence, to be distinguished from superior general intelligence. But in some cases there's overlap. I think Kasparov's IQ is claimed to be on the order of 140 or so, but one must take such claims very critically. Then of course there's midwits like Nakamura who's right around 105 or so. They'll both smoke you fools on the board, of course.