Did anyone save the 2023 zip? The link is now dead and it'd be nice to have this.
[edit]
Since there's no working version of this available on the web, I've found that someone built Chess into Plato!
https://github.com/bateast/plato/tree/plato_chess
It requires you to compile it yourself though.
Here are the basic instructions for that (in Linux, WSL2 will work):
/dist folder goes into .adds
Launch using KFMon or NickelMenu (you can use the One Click Packages and replace the Plato folder in .adds)