I always found counting chapters for 'Adventures of Huckleberry Finn' a little misleading if you're trying to map them directly to plot events. The book's 43 chapters don't cleanly break into one-event-per-chapter. Some key moments sprawl across several, like the whole Grangerford-Shepherdson feud, while others, like the famous 'All right, then, I'll go to hell' moment, are just a part of a longer, more meandering chapter. For me, the real key events are maybe a dozen, but they're embedded in that travelogue structure. If you forced me to list chapters covering major turns, I'd say chapters 15-16 (the raft separation and Huck's crisis about Jim), 18 (the feud), 31 (the moral climax), and 39-42 (the Phelps farm and Tom's scheme). But even that misses the texture of the journey.
Honestly, trying to isolate chapters for plot undersells Twain's style. The plot is the river—it flows, it loops back, it has dead ends and sudden rapids. Pinning it down to a specific number feels contrary to the book's spirit. The chapters are more like sittings around a campfire, each with its own tall tale or quiet reflection, building the whole picture slowly.