Wrote this awhile back. Still some bugs but i was kinda surprised that no one had done it yet:
https://github.com/geos64128/geochess
(https://camo.githubusercontent.com/2562421bbeda711c356a9f246e25b7d8657266486fab7eb3329bd5482f497274/68747470733a2f2f692e696d6775722e636f6d2f326446644b6d702e706e67)
Oh nice - and yes, it's odd that a chess game never existed - it's usually one of the first programs on any machine or OS.