Sworn (Mind Loft)

Sworn is a logic puzzle on Mind Loft, a free site of daily browser games, styled as a village inquest. Something has been stolen and five locals are put under oath. Each gives a single statement. The game tells you exactly how many of them are lying, liars' statements are always false, and one of the five is the thief.

The way through is case work. Suppose a suspect is the thief, then go through each statement and see whether it would be true or false; if the number of lies does not match, the theory collapses. The true story is the only one that holds together. Every case is generated with a constraint solver and checked to have exactly one consistent answer that can be reached by deduction rather than guesswork.

On the day we looked, a barrel of pickled herring had vanished from the Pilgrim Wharf fish market, and exactly 2 of the 5 witnesses were lying. Testimony stays sealed until you start. You can mark witnesses as lying, use a hint that verifies one witness, and press Accuse beside the suspect you think did it; the header counts wrong accusations, which affect your place on the daily leaderboard.

A new inquest is sworn at midnight US Eastern Time, with six suspects at the Sunday Grand Inquest. Mind Loft pairs it with Alibi (a whodunit on logic grids) and Jesters (a placement puzzle).