There were (maybe still are? I couldn't locate any active clubs with a cursory search) ham radio chess clubs that would play chess on-air over cw/radiotelegraphy.
Microchess has a C-port with an emulated MOS 6502 inside. That's it, you are actually simulating a barebones Kim-1 with Microchess as the bundled "ROM" already in RAM.
I might port the C port to its transputer with Micro-C if I'm bored.