Each round shows one half of a real pair: the same link submitted to Hacker News twice within a week under different titles, the first scoring under 100 points. You write a replacement title, then the game reveals the actual repost that broke 100 — and that’s where the automation stops, because nothing grades your version for you. You compare the two yourself and mark it a hit or a miss, ten pairs to a game, no repeats in your browser.