I don’t think you can copyright things like rules because they are fact.
Just an example, every poker site tells you to raise with aces, but what if the 1st guy to suggest that sued everyone for stealing his strategy.
A while ago, i was looking for a domain name, and went through about 10 of them until i found one available with the word “Poker” in it.
A few months later, some bozo e-mails me, saying that my domain name is infringing on their copyright, and tells me to remove my site.
WTF is that, i had never even heard of this guys site, and now he’s trying to convince me he owns the word “Poker”. Some people are ridiculous.
My advice, if you feel somebody is doing you wrong, physical pain, there is just no substitute.