I understand nothing except we have chess.

We have chess? 

 https://bsky.app/profile/fack.bsky.social/post/3lbthovht5k2y 

 Chess nip:

https://github.com/nostr-protocol/nips/blob/master/64.md

¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯ 

 https://jesterui.github.io/