This is by far my favorite change that seems probably-acceptable-to-eliezer.
I'd have preferred if the winning stroke included (at least in the "talking to buy time" section) something that addressed learning to lose, or keeping secrets, or their different mental-frameworks that enable different powers. But I assume Eliezer's less willing to retcon that sort of thing.
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.)