ch. 17 explanation https://www.reddit.com/r/HPMOR/comments/ektuat/we_want_mor_chapter_18_discussion_thread/fdhg56k
Chapter 10 analysis https://www.reddit.com/r/HPMOR/comments/e864tz/we_want_mor_chapters_910_discussion_thread/fafeot1/
Chapter 8 analysis https://www.reddit.com/r/HPMOR/comments/e864tz/we_want_mor_chapters_910_discussion_thread/faa2r4f