I think in this case, you and Eliezer are both correct, but for different definitions of "winning". If one's primary goal is to find a solution to the puzzle (and get the good ending), then your advice is probably correct. However, if the goal to stimulate the experience of having to solve a hard problem using one's intellect, then Eliezer's advice seems more valid. I imagine that this is in the same way that one might not want to look up a walkthrough for a game - it would help you "win" the game, but not win at getting the most benefit/enjoyment out of it.
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: