A murder mystery you can actually solve.
Five suspects, one body, and a solution that was fixed before you arrived. The case is built backwards — culprit first, evidence derived from it — and then a solver runs over the whole thing and proves it is fair: every innocent has something that eventually clears them, the culprit has a chain that breaks their story, and every clue can actually be reached from the opening scene. A case that fails is thrown away. You never see it.
The recording ships with the page and replays through the real renderers — the board, the notebook, the auditor and the verdict — with no account and no credits. Opening a case is free too: generating it, reading the case file, and searching every room and every object are all done here in the page and never call the model. Questioning a suspect is the part that costs.
Choose a case
Your investigations
Cases are saved to your SkillSafe account, so one you left half-solved on a laptop is waiting on a phone. Signed out, they stay in this browser only.
How a case is made fair
- The solution comes first. The culprit, the murder room and the window are chosen before a single clue exists, and every clue is derived from that structure. Nothing in the case is written by a model, so nothing in it can be arbitrary.
- Then it is proved. Eleven checks run before you are shown anything. With all the evidence, exactly one suspect must survive the alibis and it must be the culprit. Every clue must be reachable through its prerequisites from the opening scene. The free evidence alone must still bring the field down to two names with a crack already showing.
- A failing case is discarded. It is regenerated from the next seed and checked again. You are never handed a case that cannot be solved by reasoning.
- The page owns the truth, not the model. Who did it, which clues you hold, what each suspect claims — all of it lives here. The model is given the public case and a private briefing for the one person it is currently playing, and it is never told who is guilty except while it is playing them.
- A suspect who contradicts the file is refused. Rewriting an alibi, confessing without cause, or inventing a sixth person gets the answer thrown away and asked again — not narrated with a warning attached.