"The fact that skills learned by training do not transfer across different domains seems to be a universal in human cognition. In other words, you get better, at best, at what you train in – which may just sound just like good old fashioned common sense."
I found this, it seems chess doesn't make you smarter: https://theconversation.com/does-playing-chess-make-you-smar...
Relevant quote:
"The fact that skills learned by training do not transfer across different domains seems to be a universal in human cognition. In other words, you get better, at best, at what you train in – which may just sound just like good old fashioned common sense."