vranasm
Deity
I don't know, it should be easy enough to check if you have researched BW at the end of the game or not. Some special condition can be enabled to spice it up like conquest game, highest score win.
The purpose of challenger is not making in the hof table, but exploring unusual settings possibilities and see who can adapt the best strategy, at least that's how i see it.
maybe it would be, but the suggestion doesn't state this rule in any way and it has to be very precisely stated how and when can be BW reached.