The Last Four Deliveries
Rain has kept the night couriers indoors.
Easy · logic · About 5–8 minutes
Two Lights Before Dawn
The observatory needs a quiet signal before opening its roof.
Medium · constraint · About 8–12 minutes
The Messenger’s Island Circuit
A messenger must collect a seal from every island station before reaching the ship.
Medium · route optimization · About 8–12 minutes
When the Tower Agrees
Three clocktower bells have slipped out of their usual rhythm.
Medium · arithmetic · About 8–12 minutes
The Curator’s Contradiction
A museum compass has been moved from its display case.
Easy · deduction · About 3–6 minutes
The Airship’s Uneven Cargo
An airship's freight clerk has three kinds of sealed crate.
Medium · integer arithmetic · About 6–10 minutes
Tea at the North Seat
Six friends have agreed on their seats for tea, but the host has stacked the place cards in a drawer.
Easy · spatial logic · About 5–8 minutes
The Mosaic with Three Totals
A mosaic maker has six numbered tokens and a triangular frame.
Medium · digit placement · About 8–12 minutes
Seven Hours in the Frame Studio
A frame restorer has one workbench and a full day's order.
Medium · scheduling · About 6–10 minutes
One Scale Adds Too Much
A toy workshop has two electronic scales and three sealed sample blocks.
Medium · algebraic deduction · About 8–12 minutes
Six Seeds, No Shared Edge
A courtyard gardener is planning a tiny demonstration bed.
Medium · grid constraint · About 8–12 minutes
The Chain Through Four
A games cabinet contains six handmade tiles.
Easy · tile chain · About 5–8 minutes
The Ledger That Ends at Twenty-Five
A fictional market ledger begins with three credits and ends with twenty-five.
Medium · operation ordering · About 8–12 minutes
The Keeper’s Three Bowls
A keeper sets three bowls on a table and challenges you to a small game.
Hard · strategy · About 10–15 minutes
Six Rolls Across the Archive Floor
An archive's demonstration cube carries one number on each face.
Medium · spatial reasoning · About 8–12 minutes
Three Parcels, Every Label Wrong
At Bell Quay, Inspector Vale finds three parcels waiting for the museum launch.
Medium · investigation · About 4–7 minutes
The Reading Room Exchange
The museum’s reading room has been staged incorrectly for an inspection.
Easy · visual · About 3–5 minutes
The Harbor Gate’s Even Cargo
A torn release slip has halted the last cargo launch at Bell Quay.
Easy · investigation · About 3–6 minutes
Four Keys and a Missing Name
A museum key register has lost its final column.
Medium · investigation · About 4–7 minutes
The Appointment That Never Happened
A courier submits four appointment cards to explain a morning’s movements.
Medium · investigation · About 5–8 minutes
The Gallery’s Three Commands
The museum’s old indexing game uses three framed arrows to transform a three-letter drawer code.
Medium · visual · About 4–7 minutes
The Typewriter’s Six Slips
Six short code slips have fallen from an archive envelope.
Medium · logic · About 5–8 minutes
The Papers Beneath the Triangle
Three museum volunteers prepared a paper display while the curator was away.
Easy · visual · About 4–6 minutes
The Freight Office’s Forged Weight
Three sealed museum parcels, A, B, and C, have reached the station freight office.
Hard · investigation · About 6–10 minutes
One True Statement at the Empty Plinth
A small display box has been moved from its plinth.
Medium · logic · About 4–7 minutes
The Porter’s One-Swap Claim
The museum’s luggage is waiting beside the night train.
Medium · visual · About 4–7 minutes
The Passage Added to the Plan
A copied museum plan lists six passages.
Hard · logic · About 6–10 minutes
The Visit Missing from the Switch Log
The museum’s demonstration cabinet has four indicator lights: A, B, C, and D.
Medium · logic · About 5–8 minutes
Seventeen Minutes Between Two Wrong Clocks
A messenger left the harbor when its clock read 10:18 and reached the station when the station clock read 10:41.
Medium · investigation · About 5–8 minutes
The Curator’s Four Reports
The curator’s worktable originally held five objects: a book, a key, a brush, a feather, and a spoon.
Medium · visual · About 4–7 minutes
The Archive That Keeps the Missing Letters
The night archivist has left five long labels on the desk and five short labels in a tray.
Easy · wordplay · About 5–8 minutes
The Postmaster’s Backward Stamp
A postmaster uses two small operations to disguise short delivery instructions.
Medium · cipher · About 6–10 minutes
The Conservatory’s Misfiled Route Cards
The keeper of a winter garden uses four-letter route cards.
Medium · code-breaking / path · About 8–12 minutes
The Drawer With a Growing Alphabet Shift
A clockmaker dislikes a cipher wheel that stays still.
Medium · cipher · About 7–10 minutes
The Nameplate Seller’s One False Description
A market stall has six wooden nameplates.
Medium · word riddle / deduction · About 6–9 minutes
A Dictionary Filed by the Far End
A candlelit reading room has an eccentric catalogue.
Easy · wordplay / ordering · About 5–8 minutes
The Signwriter Who Erased Every Space
A signwriter has joined six labels into one continuous inscription.
Hard · wordplay / segmentation · About 10–15 minutes
The Weaver’s Inward Reading
A paper weaver has filled a small square with an instruction.
Medium · code-breaking / spatial text · About 6–10 minutes
A Letter Hiding in Three Familiar Words
A lantern keeper has lost a single brass letter from a sign.
Easy · letter riddle · About 4–7 minutes
The Beacon’s Alternating Lantern Rows
A harbor signal keeper has copied six rows from a lantern panel.
Medium · cipher / binary · About 8–12 minutes
The Moss Key and the Moving Letters
A conservatory messenger uses a repeating keyword to change the alphabet shift from letter to letter.
Medium · cipher · About 10–15 minutes
Five Word Tickets in Five Coat Pockets
A cloakroom attendant has placed five word tickets in a row of pockets.
Medium · word logic · About 8–12 minutes
The Tailor’s Six-Letter Seam
A tailor is stitching six different letter patches into a single straight seam.
Easy · letter ordering · About 6–9 minutes
A Radio Code With No Spaces Between Letters
A small radio station has a five-letter emergency alphabet.
Hard · code-breaking / prefix code · About 10–15 minutes
Three Registers and One Surviving Letter
An observatory clerk keeps three registers for every delivery.
Medium · wordplay / sets · About 7–10 minutes
The Night Ferry and the Connection You Cannot Catch
The island archive closes its parcel hatch at 08:30.
Medium · timetable deduction · About 5-10 minutes
The Cabinet That Opens Only Once
A restoration cabinet has four number wheels.
Hard · code deduction · About 10-15 minutes
The Counterfeit in the Conservator’s Tray
Eight metal tokens are laid out for an exhibition.
Medium · balance deduction · About 7-12 minutes
The Compass Behind Five Plaques
A brass compass is hidden in one of five closed drawers.
Medium · truth-count deduction · About 5-10 minutes
The Elevator With Three Working Buttons
The archive elevator has a peculiar test mode.
Hard · shortest-path challenge · About 10-15 minutes