system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are some people genius at chess, but completely normal in every other thing?

Many world champions of chess immediately become grand master at the very young age, about 12-16. But they all seem totally normal in every other thing. Why aren't their intelligence show up in other things? What makes one's intelligence specific to chess?

Note: English isn't my mother tongue, please keep it simple.
gpt
Chess is an extraordinarily simple game. You can learn everything there is to know about the game in a very short period of time. The issue is that it takes a great deal of intuition to become one of the greats, and intuition can't be taught. 

For example, you can very quickly learn how the pieces move, why it's best to keep your knights centralized or trade off bad bishops in closed positions, but seeing that abstract mate-in-four that requires you to sacrifice your queen, a rook, and a pawn is just something that you have to -see-, you can't be taught it. 

Chess strategy involves a lot of different aspects; it's not "seeing four moves ahead", it's understanding positions and tactics and making assumptions based on what you might do if you were your opponent. It's not even about studying the great games and trying to mimic them (it'll never happen). 

What grandmasters ARE good at is lateral thinking, or solving problems creatively and often indirectly using reasoning that isn't immediately obvious. This sort of approach to problem solving is very useful in a lot of different fields, but isn't the primary focus of very many.