I'm not sure what "having the entire plot planned out from the beginning" really means, though. Eliezer ends up retconning things relatively frequently, so I wouldn't be surprised if he had a plot point like "Voldemort captures Harry" followed by "Harry escapes", but with too few details in between to make the logic ironclad.
If HPMoR was a conventional book, then Eliezer would have a lot of time to edit it and make all the retcons behind the scenes -- even fairly major ones -- but it isn't, so he can't.
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 113.
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.)
IMPORTANT -- From the end of chapter 113: