If you go to Rey Enigma's website and look under 'Aviso Legal' (legal notice), you will see that the site is registered to a company. When you then look up that company in company records, then you'll see a name. If you look up that name, you'll see that there is a Spanish IM, rated 2379, by that name. The guy happens to be a popular chess commentator and popularizer in Spain. Of course, it could just mean that he is Rey's manager... but the rating is precisely what Hikaru predicted.
I refuse to believe Hikaru knows anything about chess. I also refuse to believe he's smart enough to have done this investigative work himself. I assume someone messaged him this information, and he pretended to guess a 2375 rating.
I'm being a bit facetious of course, but to pin someone down to a 50 point range... it's just silly. I know most of his fans have no idea how to play chess, so they're entertained by it, but...
... maybe he just got lucky.
If you go to Rey Enigma's website and look under 'Aviso Legal' (legal notice), you will see that the site is registered to a company. When you then look up that company in company records, then you'll see a name. If you look up that name, you'll see that there is a Spanish IM, rated 2379, by that name. The guy happens to be a popular chess commentator and popularizer in Spain. Of course, it could just mean that he is Rey's manager... but the rating is precisely what Hikaru predicted.
Excellent internet sleuthing. *Applause*