However, since f3 is also covered by black's bishop, it is impossible for white's king to have been on that square before that ;) The very specific set of constraints make it so that this puzzle should really just have a single objective solution. (Solution is in the spoiler tag in the post body)
Good to know, thanks. I do think having an obvious name is important when trying to grow a community, I have never heard of woodpusher before as a term for chess, so idk. But I'll subscribe and check it out. I agree that the number of users is pretty low, so the chance of this failing is pretty high, but just wanted to try anyway :) Also the anarchy chess community at !anarchychess@sopuli.xyz does have over 6k subscribers and is at least a little bit active, so there should be some users around
I simply chose feddit.org, because it is my home instance and I am very happy with how it is being maintained and taken care for (i.e. see https://feddit.org/post/25348485 or https://feddit.org/post/5050805). It is operated by a non-profit organization (https://fediverse.foundation/) and Lemmy.world already seems like the biggest instance, so in the spirit of decentralization I think it makes sense to spread the content out a little.
Not too sure about lemmy.ml, I know the political views of some of the admin are at least questionable and in general it seems quite political, which I don't really need for a chess community
Apparently they plan to add support for it this year: https://www.db.com/news/detail/20241122-european-digital-payments-app-wero-now-available-for-postbank-customers?language_id=3
I've been using FitoTrack recently: https://codeberg.org/jannis/FitoTrack
Available on the AppStore and F-Droid
Tracking and logging/history and statistics works flawlessly for me so far, the rest of the app is quite minimalistic, but I like that, not every app needs to be a bloated social media network imho
Don't think there's any self hosting possible or rather necessary since it's all locally anyway as far as I see but it has an option for exporting the data and creating automatic backups