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Before the game, it is necessary to clearly agree on the rules for capturing objects while bypassing guards, as in the sea, many objects can be accessed freely.
It makes sense to minimize the list of objects for which access bypassing the guards is prohibited. Obviously, such objects as artifacts and pandoras must be included in this list. In fact, these two types of objects can be the only ones; I don't see any other obvious options, except perhaps we could consider dwellings of creatures. Quests with shifted guards should not exist, as these were former mines.