Privacy Policy

The short version

You can play Memory Chess without creating an account. We use a small amount of data to run the game, remember your settings, understand how the site performs, respond to messages, maintain the leaderboard, and improve the experience. We also use Google AdSense, which may use cookies and similar technology for ads when advertising is enabled.

Who is responsible for your data

Memory Chess is run by Bing Cheng, an independent developer, who acts as the data controller for the personal information described in this policy. For any privacy question or request, email bingcheng45@gmail.com or use the contact form.

Information you give us

• Contact messages: your name, email address, inquiry type, and message when you use the contact form.
• Game feedback: your star rating, optional comments, and game details such as accuracy, difficulty, piece count, and completion times. This feedback form does not ask for your name or email address.
• Leaderboard entries: the player name you choose and the score details you submit. These are displayed publicly, so please do not use your real name if you would rather keep it private.

Information collected automatically

Our measurement providers may receive technical and usage information such as pages viewed, approximate location, browser and device type, referring page, IP address, and performance timings. Memory Chess uses Google Analytics, Vercel Analytics, Vercel Speed Insights, and Ahrefs Analytics to understand traffic and keep the site fast and reliable.

We do not ask these tools to collect the content of your contact messages or game-feedback comments.

Cookies and browser storage

Memory Chess uses browser storage to keep game history and settings on your device, remember sound preferences, avoid repeating a dismissed update banner, and time when the feedback prompt may return. Clearing your browser data resets these choices.

Liking an article saves the id of that article and the like count shown at that moment in the local storage of your browser, so the like button stays pressed and its count does not fall when you come back. Session storage remembers which articles you opened in the current tab, so opening one again there does not add a view. Both lists stay in your browser. When you like an article, Google Analytics also receives a like event that names the article.

Google Analytics and advertising services may use cookies or similar identifiers. You can block or delete cookies in your browser, although some preferences may stop working as expected.

Advertising and Google AdSense

Memory Chess uses Google AdSense to support the site. Third-party vendors, including Google, may place or read cookies, use web beacons, or process IP addresses when advertising services or ad tags are used.

Google and its advertising partners may use advertising cookies to serve ads based on your visits to Memory Chess and other websites. Depending on your location, choices, and settings, ads may be personalized or non-personalized. Other Google-certified ad vendors may also participate in serving and measuring ads.

Google is one of these vendors and uses the DoubleClick cookie, also known as the DART cookie, to serve ads based on your visits to this site and other sites on the internet. You can opt out of the DART cookie through Google's ad settings linked below.

Learn more about how Google uses information from partner sites. You can manage personalized advertising in My Ad Center and opt out of some other vendors through YourAdChoices.

Consent choices

Where required, visitors are shown a consent message before eligible advertising data is used. Visitors in the European Economic Area, the United Kingdom, and Switzerland can consent, decline, or manage individual choices through Google's consent platform. You can also change cookie controls in your browser and adjust Google advertising preferences in My Ad Center.

How we use and share information

We use information to provide and secure Memory Chess, calculate results, publish submitted leaderboard scores, reply to contact messages, review feedback, measure site performance, prevent abuse, and support the site with advertising. We do not sell the contact details or feedback you submit.

Data is handled by service providers only where needed: Google Sheets for contact messages and game feedback, Supabase for game statistics, leaderboard entries, and article view and like totals, Vercel for hosting and performance measurement, Ahrefs for analytics, and Google for analytics, consent, and advertising. These providers may process data in other countries under their own privacy terms.

When you open or like an article, Supabase stores only a total of views and a total of likes for each article, with the time of the last change and no visitor identifier.

Retention and security

We keep submitted information only for as long as it remains useful for the purposes described above, including maintaining the public leaderboard and responding to messages, or as required by law. No online service is perfectly secure, but we limit access and use reasonable safeguards for the systems we control.

Your choices

• Play without submitting a leaderboard name or feedback.
• Clear stored game data and preferences in your browser.
• Manage cookies, consent choices, and personalized ads.
• Ask us about, correct, or request deletion of information you submitted, subject to applicable law and our ability to verify the request.

Your rights under GDPR and CCPA

If you are in the European Economic Area or the United Kingdom, the GDPR gives you the rights of access, rectification, erasure, restriction of processing, objection to processing, and data portability. The legal bases we rely on are your consent, for personalized advertising and analytics cookies where consent is required, and our legitimate interests, for running and securing the site, publishing the leaderboard scores you submit, and answering the messages you send. You may withdraw consent at any time through the consent message or your browser settings, and you may lodge a complaint with your local supervisory authority.

If you are a California resident, the CCPA gives you the right to know what personal information is collected, to request its deletion, and to opt out of its sale or sharing. We do not sell your personal information. Cookies used for personalized advertising may count as sharing under the CCPA, and you can opt out through the consent message, My Ad Center, and YourAdChoices linked above. This is our Do Not Sell or Share My Personal Information notice. To exercise any of these rights, email bingcheng45@gmail.com.

Children's privacy

Memory Chess is a general-audience training game and is not designed to collect personal information from children. If you are a parent or guardian and believe a child submitted personal information, please contact us so we can review and remove it where appropriate.

Changes and contact

We may update this policy when the site or our service providers change. The date at the top shows the latest revision. For privacy questions or requests, use the Memory Chess contact form.