Changing rooms, a poolside and a plant room — cases where most of the plan is a single wet space.
The pool hall itself, changing rooms, showers, a lifeguard station, a sauna, the plant room behind a door nobody looks at, a sun terrace. Like the supermarket, this is one dominant space with small rooms around its edge, but here the small rooms are the interesting ones.
The dominant pool hall means the deduction usually runs the other way round: instead of narrowing someone into a room, you work out who could not have been in one of the small edge rooms. A good theme for practising negative clues.
A case picks its floor plan from this theme’s room pool, so the same places recur across the drawer and you learn to read them: Main Pool, Paddling Pool, Sunbathing Lawn, Sauna, Steam Room, Slide Tower, Massage Room, Relaxation Room, Locker Room, Showers, Restroom, Kiosk, Bar, Reception, Terrace. No single case uses all of them — the generator and the hand-built cases alike take a subset, which is why two cases in the same setting can still feel unalike.
8 cases — 2 easy, 2 medium, 4 hard, on boards from 6×6 to 8×8. Every one is verified to have a single solution reachable by forward deduction alone, so none of them needs a guess.