It's chess with the DVD logo as an NPC. Full rules at the bottom. Spawn one manually to test it out, or promote a pawn to get one. Runs a modified version of Fairy-Stockfish, and who knows the bot might even know how the DVD piece works. unclear. here is the source code

Move history  (select a row to jump; includes the DVD's own moves)

How the DVD piece works

The way this works is i forked the fairy stockfish and messed it up a little, and then patched in their code to make it compile to wasm and then pretty much thats it. That code is licensed as GPL-3 and so is fairy stockfish so i guess this is also licensed as GPL-3. I got the inspiration for this from some meme i saw but i don't want to like link everyone to their profile without asking and i don't even know if they came up with it. so if you were the one who came up with the dvd chess meme and want me to link to you then just idk raise an issue or dm me or something.