M. B. Downey
A friend proposed a variant in which players don't know which countries they're playing and thus submit orders for all seven countries. I said I thought that a variant along these lines already existed, but I couldn't find anything about it online. Does anyone know about this? Thanks!
I would think you would quickly narrow down which country you were based on which orders each nation followed. If they didn't follow yours, it wasn't you. So really this would only affect the first season or two.
I'm not familiar with the variant the OP referred to, but I do remember more than one variant which involved hidden movement -- and the only reveals occurred when a conflict needed to be resolved.
I played in a PBEM game with fog of war where you only saw units you were next to. You only heard that supply centers had fallen, but not necessarily to whom. This required a moderator, but i think there are some online judges that implement this.