Derek Nalls wrote on Thu, Dec 10, 2015 03:19 PM UTC:
Spherical Chess 400
http://www.symmetryperfect.com/shots
There is really only one game left on my Symmetrical Chess website anymore.
Greg Schmidt (the Axiom programmer) and I have tried in a few ways and
failed to make it computer AI playable at a minimal, decent level. I think
we now share the opinion that such a goal is not achievable with
state-of-the-art computer hardware technology and programming. From what
you express, I think this game may interest you more than Go, Arimaa or
Gess. Feel free to write me for details.