# The Cartographer's Lie

> A daily deduction puzzle set on a hand-engraved nautical survey chart. One hex
> on the chart has been drawn as something it is not — the lie. Every survey note
> you are given is true, and exactly one hex can satisfy all of them at once. Find
> it and file your correction; you get three tries.

The Cartographer's Lie is a free daily logic game, playable in any browser at
https://cartographerslie.com, and as a free app on iPhone and Android. A new
chart is drawn every day at 5am America/New_York, the same island for every
player. It is played by reading survey notes — compass bearings, adjacency
counts, sheet locations, ground types — and eliminating hexes until one remains.
It is made by one person, Kevin Marsh, and launched on the web and iOS in
August 2026 and on Android in October 2026.

## How it works

- The board is a ~48-hex island. Each hex is a "ground" (shoal, reef, saltmarsh,
  scree, heath, sink) and may carry a landmark (beacon, trig point, wreck) or a
  reading (magnetic anomaly, tidal race).
- Every note is TRUE and describes the lie. Notes never contradict each other;
  together they narrow the island to a single hex.
- Bearings are strict: "north-east of" means north of AND east of, both at once.
- Hard charts add denial notes ("the lie is not…"), which are still true — they
  tell you what the lie is not, so you rule out every hex the plain claim fits.
- Fiendish charts add soundings: every hex prints a depth in fathoms, one is a
  misprint, and you name both the hex and its true depth.
- The clock starts when the chart is turned over and never pauses. A refused
  correction adds three minutes. The judged time is what goes on the record.
- A finished chart gives a spoiler-free share grid: it records when each note
  was struck off, never what any note said or where the lie was.

## Tiers

- Casual and Standard: playable free in the browser and in the apps.
- Hard: free in the apps.
- Fiendish, unlimited extra charts and the full archive: part of the
  Cartographer's Guild membership in the apps (US$3.99 a month or US$29.99 a
  year; prices vary by country).
- Streaks, Glicko-2 ratings, a seasonal career ladder and asynchronous duels
  against friends: in the apps.

## Key pages

- Play today's chart: https://cartographerslie.com/
- How to play (full rules, an interactive tutorial, and a FAQ): https://cartographerslie.com/how-to-play
- About the game and its maker: https://cartographerslie.com/about
- Privacy policy: https://cartographerslie.com/privacy
- Terms of use: https://cartographerslie.com/terms
- iPhone app: https://apps.apple.com/app/id6802133271
- Android app: https://play.google.com/store/apps/details?id=app.cartographerslie.game
- A shared result (chart number and outcome in the address): https://cartographerslie.com/c/212/7m41g1

## Facts

- Category: daily puzzle / logic deduction game, in the family of daily games
  like Wordle, but spatial rather than lexical: the clues triangulate a position.
- Price: free to play; optional Guild membership in the apps.
- Platforms: web browser, iOS, Android. Same engine and the same daily chart on all three.
- Cadence: one new chart per tier per day, rolling over at 5am America/New_York.
- Languages: English, Spanish (Spain), Spanish (Mexico).
- No advertising inside the game; the website may carry ads in the margins.
- Not affiliated with Wordle, the New York Times, or any other puzzle publisher.
- Contact: info@mieruconsulting.ai