I would say that the whole thing took about 3 hours (maybe more if the walk to the cemetery took a lot of time), so now that Harry used his last hour, he's about 3 hours before his past self gets the note. He has to occupy that time, and what better way than to try to free Dumbledore?
I don't mind him not succeeding - I already have my "as good as possible" ending.
so now that Harry used his last hour, he's about 3 hours before his past self gets the note.
In that case, the big explosion would happen about 2 hours before his past self gets the note, which would make the timeline inconsistent, since no such disturbance of the Quidditch match occurred while past!Harry was there.
Given that constraint, everything that happened since Harry time-turned five hours back must have taken at least five hours.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 114, and also, as a special case due to the exceptionally close posting times, chapter 115.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)