Where to find the rules of 2 players variants in Puerto Rico?

[Etoclas]

Hi all,
I've been playing Puerto Rico on Board Game Arena for 4 days, and now I'm moving to the 2 players mode from the 3/4 players mode.
That's the question: which rules are used with 2 players? I saw there are two variants, one of them is called Craftsman Angst. Puerto Rico's page on BGA doesn't say about those variants, can you tell me where to find both rules descriptions?

Thank you for you patience,
Etoclas.

[Liallan]

I already responded in the game-specific forum.

[Etoclas]

Yes, I saw I thought it would be effective to write in 2 sections so people would see it, but I see the forum is active and I'm glad to see that.