Ludii VS xcloud-shield

Have you tried Ludii https://ludii.games/? The AI engine will play any game on the platform, and it is a small Java program. The AI is not very good, and you would need to write a rules file, which can be tricky. But there are a lot of existing templates to modify. Though I don’t know about 4 way chess, which is what your game seems to be. I am curious about the rules. I tried the links but one didn’t work at all and the other just showed me a picture. I think the current AIs would be assuming normal chess and would get very confused. I don’t think AI is advanced enough yet where we can input novel game rules and get a game out, let alone a bunch of code for an engine for a tricky 4 way chess variant. Maybe in a few years.

Ludii games can be played on your own computer using the free downloadable player, or on the website. Games played on the player can be played against others online. There are multiple reference documents and tutorials available, and the project open source (GitHub repo, in Java).

That "xcloud beta" app looks shady, as there's no actual source code for it on GitHub -- just APKs and invalid files like this one: https://github.com/mistertest/xcloud-shield/blob/master/xcloud-Shield.java

Xcloud Github

It's not streaming from your computer but this works pretty darn well for me - https://github.com/mistertest/xcloud-shield

Is unfortunately locked in 720p max on android devices. The unique way to improve the resolution is to play in other devices such as MacOs or Windows which the resolution is 1080p/60. There are modders that circumnavigate that problem with their version , but it works only on Shield, Chromecast with Google Tv and Android TV ( https://github.com/mistertest/xcloud-shield ).

Unofficial Nvidia Shield app (apparently better; haven't tried it myself) https://github.com/mistertest/xcloud-shield

This might be what you're looking for :) https://github.com/mistertest/xcloud-shield