The Last Elevator
Nobody used the stairs. One ride is impossible.
Your role
Evidence is a system. Read it like one.
Audit travel times, capacity and access restrictions across a high-rise lift system.
First-case tutorial
What you actually do
- Compare each departure with the maintenance interval.
- Interval endpoints are included.
- Find the ride during lockout.
Formal rules
- Maintenance lockout: +28s through +35s.
- No manual service mode was active.
Cases in this family rotate through multiple reasoning archetypes, so higher difficulty changes the deduction structure rather than simply adding more rows.
Floor RestrictionTravel WindowCapacity LoadMaintenance Lock