How well does Blackmoor MMRPG line up with Living Greyhawk?

[Keolander]

Does this Outdoor Survival Board hail from that time when a number of people were all using parts of the same map?

I believe it actually does. Not sure how Mr. Arneson used it since (presumably) he had the environs outside Castle Blackmoor mapped out early on. Like I said, I would think it could be used for the area 'beyond the borders of the map'. I'm not actually even sure how Mr. Gygax used it, though I suppose The City of Greyhawk was represented as the one city along the river (with Castle Greyhawk being in the same hex).