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Case No. 1

·July 18, 2026
Last night at Thornfield Manor, the Marlowe Emerald vanished. Four guests — Hugo, Ambrose, Beatrix and Ingrid — were each alone in a different room, each left at a different hour, and each was carrying one curious item. Work out who was where, when they left, and what they carried. Every statement below is true.
confirmed 0/12wrong accusations 0
Witness statements
1. Whoever was in the Kitchen was carrying the brass key.
2. Ambrose left before the guest in the Greenhouse.
3. The guest in the Library left at 8 pm.
4. Ingrid was not carrying the torn letter.
5. Beatrix was never in the Greenhouse.
6. Hugo was not carrying the torn letter.
7. The guest in the Kitchen left at 10 pm.
8. Ambrose was never in the Library.
9. Hugo left earlier than Ingrid.
10. Whoever was in the Gallery was carrying the ivory comb.
Tap a statement to cross it off. Tap a board cell to cycle: blank → ✗ (impossible) → ● (confirmed). Each suspect gets exactly one ● per board.
Detective’s board
Rooms
GreenhouseGalleryKitchenLibrary
Hugo
Ambrose
Beatrix
Ingrid
Departure times
7 pm8 pm9 pm10 pm
Hugo
Ambrose
Beatrix
Ingrid
Items carried
ivory combempty vialtorn letterbrass key
Hugo
Ambrose
Beatrix
Ingrid
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About Alibi

Alibi is a free daily logic puzzle from Source of Truths — an Einstein-style deduction game dressed as a nightly whodunit. Something has vanished from the manor, and four guests were each alone in a different room, each left at a different hour, and each carried one curious item. The witness statements are all true; the detective work is yours.

Fill the three deduction boards the way a pencil-and-paper logician would: cross off what a statement rules out, confirm what elimination forces, and let the ✗s corner the ●s. Every case is generated with a constraint solver and machine-verified to have exactly one solution, so a careful chain of inference always closes the case — no guessing, no leaps.

A new case opens every day at midnight Eastern. No app, no signup — play free in your browser, keep a streak, and race the daily leaderboard. More dailies: Cipher, our daily cryptarithm, Links, our hidden-threads game, and Suds, our daily sudoku.