Testimony Loom: reconstruct the timeline, then find the one account that frays

Testimony Loom is a free, original linked-matrix logic game. Each of its sixteen fictional low-stakes cases gives you four people, four places, four times, and a set of independent records. Translate the records into two linked 4 by 4 grids until exactly one place-and-time mapping survives, then challenge the single personal account that disagrees with it.

Every case is exhaustively verified: the game checks all 576 possible mappings and ships only record sets that leave one. There is no timer, no account, and no advertising. This site counts page visits through Cloudflare: it sets no cookie, it cannot follow you from here to another site, and nothing from your play is part of the count. Undo is unlimited, the smart pencil and forced-single fill work only from marks you made yourself, and all casework stays in your own browser.

The interactive case drawer loads below. If it does not, the player guide explains every rule, the method page documents the uniqueness proof and originality record, and the privacy page lists exactly what is stored locally.