Privacy & cookies.

Saving your puzzle

You can explore the book and play the free cases without an account or an email address. By default, your work stays in the open page’s memory. It may be lost when you reload or leave.

Choose “Accept all” in the privacy banner to enable puzzle saving and optional analytics together. To choose them individually, open Cookie settings, select “Remember my puzzle progress”, and choose “Save preferences.” Saving stores your grid marks, reviewed clues, hints, accusation, solved status, and a record of your permission in this browser. The website’s application code does not send your puzzle answers to a server.

Once saving is on, each move is saved automatically. The settings close after you save your choices, and you do not need to approve saving again while playing. Existing permissions keep their original scope: an earlier analytics-only acceptance does not turn puzzle saving on.

Your save and permission expire 30 days after you turn saving on. Expired items are removed when you next open or use the page. They are not automatically erased while the site is closed, and your browser may remove them sooner.

Change your choice

Open Cookie settings from the footer or the bottom of the case. Uncheck “Remember my puzzle progress” and save your preferences, or choose “Delete saved progress.” Both turn saving off and delete all saved cases and the permission record. Your current work stays visible on the open page. “Reject all” turns off both puzzle saving and analytics.

“Start over” resets the puzzle. If saving is still on, the new blank puzzle is saved under your existing choice.

Your choice applies to this website in this browser. Other browsers, devices, and website hostnames have separate storage. You can also remove this site’s data through your browser settings.

Optional analytics

With your consent, Google Analytics 4 helps us understand how visitors find and use this website. It can measure page views, traffic sources, device and browser information, general location, scrolling, and interactions such as outbound links. Google processes technical information, including your IP address, to provide this service.

We also measure clicks on Amazon purchase links and the start and completion of the free puzzles. A completion event can include the number of hints used and whether the walkthrough was opened during that visit. We do not include your grid marks, reviewed clues, accusation choices, name, or email address in these events. Amazon clicks do not tell us whether you bought the book.

Analytics is off by default. Google’s analytics script is requested only after you choose “Accept all” or enable “Optional analytics” and save your choices in Cookie settings. Google advertising features and advertising consent remain off. Analytics is limited to the home page, solving guide, free puzzle archive, and individual free case pages on the production domain; it is not collected on this privacy page, error pages, or preview hosts.

Choose “Reject all” to keep both optional features off, or leave analytics unchecked when saving your preferences. Both accepting and rejecting analytics are saved for 30 days in one-fair-solution-analytics-consent-v1 in local storage, so we can respect your choice without asking on every page. Puzzle saving and analytics have independent controls and permission records, even though they share one dialog.

If you accept, Google Analytics uses first-party cookies named _ga and _ga_820N4VGRL7 to distinguish browser visits and sessions. We configure them to expire no later than your current 30-day analytics permission, without automatically extending that lifetime on each visit. Your browser may remove them sooner.

You can withdraw consent through Cookie settings in the footer of any page. Uncheck analytics and save your preferences, or choose “Reject all.” Withdrawing analytics stops further measurement on open pages and removes these analytics cookies where the browser permits. It does not delete data already collected by Google. If your browser prevents saving your choice, analytics stays off on the current page and an explanation is shown.

Google processes analytics data under its applicable terms and the Analytics property’s retention settings, potentially using infrastructure outside your country. See Google’s Privacy Policy (opens in a new tab) and how Google uses information from partner sites (opens in a new tab). Depending on your location, you may have rights to access, correct, or delete personal data, object to processing, or complain to a data protection authority. Use the privacy contact below for questions or requests.

Cloudflare hosting & security

This website is hosted on Cloudflare Pages. Technical information such as your IP address, browser information, requested URL, and request time is processed to deliver and protect the site.

Cloudflare may use security cookies when enabled protection features need them, such as when a security challenge is shown. This depends on the site’s Cloudflare settings. Your puzzle-saving choice does not control this hosting or security processing.

Cloudflare describes its processing, retention, and any international transfers in its Privacy Policy (opens in a new tab) and cookie documentation (opens in a new tab).

Amazon & fonts

Purchase buttons are ordinary links to Amazon. Once you follow a link, Amazon’s privacy and cookie policies apply. This site does not collect payment details or process book orders.

Puzzle saves are not used for advertising or cross-site tracking. Images and fonts are served with the site, without a separate request to Google Fonts.