system
Given the following post, respond as if you're commenting on Reddit:
human
Why is an ordinary old computer able to beat an average-decent chess player, while it takes a supercomputer to beat a grand master?

Perhaps my question is a bit of strawman, - as what's considered 'average' is probably actually quite skilled. So, I'm not sure that ordinary computers can beat the 'average' player - I'm basing this on my old 486 constantly beating me when I was younger. :)

But if we can proceed with the question - Is there some kind of theory that explains human knowledge/skill in terms of computer power?
gpt
It doesn't take a supercomputer to beat a grandmaster anymore. You're probably thinking of Kasparov's match, but remember he was playing against a supercomputer from the 90's. A good chess engine running on a normal PC can easily beat today's top ranked players. The software has also gotten a lot better. An HTC Touch HD reached grandmaster level in a tournament.