About
About lie.up
lie.up is a free daily logic puzzle. Every day, everyone gets the same three cases: one easy, one medium, one hard. In each case one suspect did it, and you have to find out who.
The idea
The suspects stand in a police lineup and each one makes a single statement. Everyone is either honest, so all they say is true, or a liar, so all they say is false. The culprit always lies, but not every liar is the culprit. You work out who is lying, and from that, who did it.
The name is a pun: a lineup of suspects, and the moment when the lie is up.
Fair puzzles, no guessing
Every case is generated from the date, so all players see the same puzzle on the same day. Before a case reaches you, a solver checks two things: there is exactly one possible answer, and it can be reached by reasoning alone, step by step, without guessing. After each case, "How to crack it" walks you through that reasoning.
You get three strikes per day across all three cases. Notes are free; only a wrong accusation costs a strike.
Made to be private
There is no account, no cookie banner, no advertising and no tracking. Your progress is saved in your own browser and never leaves your device. Details are in the privacy policy.
Who makes it
lie.up is an independent hobby project made in Germany. Feedback, puzzle ideas and bug reports are very welcome.
Contact: [email protected]