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What nonsense are you talking about?! You don't need many Castles?! You do need them!!! Right now, the maximum is eight Castles!! You can't play properly!!! If you want the computer to move quickly, buy a decent computer (sorry for the tautology). On my "huge map with a Dungeon" for eight players, the computer takes no more than 3 minutes to complete its turn (I mean not just one opponent, but all of them together take 3 minutes). Difficulty: "Hero".
P.S. There's no need to say "definitely". You're presenting your personal opinion as the opinion of the public!!! You're like Zhirinovsky...
P.S. Definitely, my opinion is only my opinion;-)))))))
Снова играю в Герои5!