Doubtful, and no...there is no evidence of any kind that being good at chess "leads" to having a high IQ.
IQ is an antiquated measure in any case, but the claims of 160+ IQs on this site are laughable regardless. We're talking about a 99.9968313965% percentile, here. A 160+ IQ married to 156 IQ? Somebody has a Mensa chapter that wants to make more money on membership dues, or maybe they are just lonely...
Someone here was saying that they only have a 130 IQ. 130 IQ is near genius level, and close to the 98th percentile. Yet if you post a thread here, 130 seems low, and you will find that about half of the people think they are 1 in 100, and a good chunk think they are 1 in 30000...what a load of BS.
My most "official" IQ test was 138...which seems inflated. My SAT scores are 99th percentile, which would be closer to 135. I have, however taken online IQ tests that score me at 150+...they are complete hogwash. Inflating IQ results leads to more website visitors, more paying membership dues, more magazines sold, etc. It's that simple. Everyone likes to think they are a hero/genius.
When the BBC did their documentary on intelligence, which Susan Polgar participating, they scoured the countryside for the smartest people they could find. They had 1 single guy with a verified 160 IQ. He lost, by the way, in the overall results. Susan Polgar was near the bottom, as well, for those of you on your "chess = high intelligence" kick.
You don't know this, and you don't know how IQ relates to chess.
No. Skills are unique. I'm sure he could have been a very good player if he had started young, worked hard, and had a passion for chess, but it's doubtful he could have been one of the very best. Different skills are different.
I agree, and I think Einstein would be chanceless, because he didn't have the enthusiasm for chess. I guess he was smart enough but enthusiasm is required to go all the way above 2700. Magnus is a true enthusiast, and supertalent both in maths and memory, he his physically very fit and he hates to lose. Winner instinct. All those talents that Magnus has is a combination that is very unusual. Einstein probably had some of these talents, and he had enough talent to become fantastic in the field were he had enthusiasm.