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Besides being unpleasant and sometimes wasting extra time and nerves, it also provides new reasons for theoretically unfair play and "suspicion."
A simple example: during an opponent's turn, the connection breaks, and they can't complete their turn or save it. You have to redo the turn. Accordingly, if "something went wrong" during your turn, just unplug the power cord and redo the turn – this joke takes on real meaning. Moreover, as far as I understand, there is no mention or practice of "completely replaying turns" in the Heroes 3 community.
But couldn't you do the same thing without password-protected saves, simply by restarting the computer and saying that the power went out, for example?
Пусть мой враг будет силен и страшен. Если я поборю его, то не буду чувствовать стыда.