What is an AU fanfic


So the tip of the scales of the difference between AT and non-AT seems to me to be summarized for you rather the extent of the changes, is that correct?

That's pretty good, yes. I call it "tolerance threshold". There are ways of storytelling that present the story (clearly based on the Canon) in a new light, but lead to an almost identical ending. In this I see the challenge of writing to a certain extent - playing with the "butterfly effect", the almost philosophical dealing with the space-time paradox. Does an entire storyline really change when some details are subjected to a change, or are there just certain inevitables? In a fantasy world like HP's, I see a far greater potential for change, while in a story in the historical context of the real world, that is not really possible. Of course, I can give characters my view of their personality. Of course, I can describe incidents that spring from my imagination, but they must not noticeably influence fundamental events or even make them impossible, such as Gutenerg's invention of printing with variable letters. That was so, that is documented, period, the end. I can't come up with the idea of ​​letting poor Gutenberg fall victim to an assassination attempt, so that this turning point in history will be postponed by years or decades (someone would have invented it sometime in his place, but not around 1453, what leads to a noticeable change in the entire history of Europe / the world).
This is now a "more extreme" example, but it describes what I mean by the distinction between "complete AU" and "simple AT". I can put Gutenberg's fantasy figures aside, the existence of which has never been documented. I can involve him in adventures, which do not change the important stages of his life. I can interpret how funny I am and weave in things for which there is nowhere in the history books the slightest hint - but at the same time I am not allowed to take what is known ad absurdum. So I am subject to laws that go beyond my personal logic in storytelling, in a nutshell: the Canon still sets the tone.
With a "pure AU" I can free myself from these shackles and tell a completely new story with familiar characters. We also have it on the big screen in a big way, namely with "Star Trek". The last three films presented an AU world for TOS, with the characters we know on the Enterprise we know in a completely changed timeline, new / never even rudimentary pairings, other encounters / beings / races, etc. - that would be a clear AU for me.

But what I would be interested in: How would you classify your story if you just changed the Horcrux thing?

Hm, even then it would be an AU. Voldemort would not have sacrificed his time and energy to tear his soul into pieces and enclose it in various objects - so he would not be (almost) immortal. I, too, have worked with black magic practices, connected with the explanations given in HP volumes 1-4 up to his "reawakening" in the cauldron, and this cauldron story arises from Celtic mythology. So I stayed with her and didn't mix up different cultures. Hogwarts is in Scotland, I move in Great Britain, so I stick to the mythology that belongs to these areas - that was my logic.
Due to the omission of the Horcruxes, Harry was of course not one himself and he did not have to die for Voldemort to die too. Trelawny's prophecy that neither of the two can live as long as the other has not died, was carried out more radically / literally - just as Voldemort himself understood the prophecy in the books: Harry must be destroyed so that he (Voldemort) finally has its peace. And so it also applies the other way around.
That for example the lightning-shaped scar on Harry's forehead had to disappear after the final death of Voldemort, since it is a magical and not an ordinary scar / is based on a curse, was a logical consequence for me at the time. The lack of the Horcruxes definitely involves a whole lot of details and inevitably leads to a categorization of the story as AU, because in the end something completely different came out than in the books.