Sort nine words into three groups of three that share a category. Free English browser word puzzles, with four mistakes, hints, category explanations, and easy/medium/hard practice. No account or download. Shared daily board changes at midnight UTC; a finite collection of 38 original boards repeats after a full cycle. Practice replays that collection.
TrioNine was submitted to SlowDen by MORROWCAT LABS. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-10-03. It runs in the browser with no download, no install and no sign-up.