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Dmitry. I don't entirely agree about the unknown maps. For several reasons. Firstly, there are always maps, even well-known ones, that you would eliminate first. You just don't like them, no matter what... Secondly, it's not that difficult to learn a completely new map, especially if there's a decent readme file. And thirdly, regarding which is more interesting... I think there's absolutely no difference, because on known maps, players will use tried and tested tactics, while on unknown maps, both will be experimenting. So, in the second case, the game will even be more exciting. IMHO.
