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H. G. Muller wrote on Tue, Jun 7, 2022 03:11 PM EDT in reply to H. G. Muller from Thu May 26 05:33 AM:Excellent ★★★★★Some Nemoroth pieces are 'color blind': they capture or otherwise affect friendly and enemy pieces in exactly the same way. The only effect of their allegeance is then which player is allowed to move them. But when they are petrified neither player can move them, and in effect they become neutral. An alabaster and an obsidian Leaf Pile are really the same piece, from a game-theoretical point of view, and that also holds for petrified Wounded Fiends. Likewise petrified Go Aways are all the same. And since they lose their special power on petrification, they are also the same as a Mummy. And they only differ from petrified Humans when we adopt the rule that petrified Humans promote to Zombie when pushed to last rank. Which would also make it necessary to distinguish petrified Humans by color.
Petrified Basilisks remember their allegeance because of the Basilisk's asymmetric move, which is preserved in the way it sees. Ghasts have a more severe effect on foes as on friends.
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Just over twenty years after the initial publication of this page, the first ever computer implementation of Nemoroth is live, complete with a basic alpha-beta pruning AI. You can play in your browser at this link: https://azgoroth.itch.io/nemoroth
The only thing I haven't implemented is the Go Away push order, which I've been putting off due to how laborious the UI considerations are. As a placeholder, Go Away pushes are clockwise from top.
I originally wrote this implementation in TypeScript, but the AI was too slow and I ported it over to C++ using WebAssembly. I plan on open sourcing it eventually once I have more opportunities to clean up the code. This is one of the most difficult software projects I have ever worked on; I have known about Nemoroth since around 2013 but was not a strong enough of a programmer to pull it off until now.
I found a number of ambiguities in these rules, which I have tried my best to address reasonably on the linked page. Some have been covered in this comments section, some not (for example, if a Wounded Fiend leaves an already ichorated square, does the ichor stack to 11+ plies or max out at 10?).
The AI is surprisingly dangerous. It mobilizes the Ghast immediately and WILL advance it to d4/d5 if you let it, usually costing you the game. I have managed to beat it a few times, but it's tough as nails for how crude the programming is. Beware!
Ralph, if you're out there, thanks for this amazing variant. I tried to email you to get permission to make this but alas, I never heard back.