David Menéndez Rujas (hereinafter "CHESS STALKER"), Spanish National ID 71771512N, Calle Concejo de Ibias 1, 2ºT, CP 33204, Gijón, Spain, informs Users about the use of cookies on this Website.
01
What are cookies?
This Website uses cookies and/or similar technologies that store and retrieve information when you browse. The information collected is anonymous and does not contain any sensitive information.
02
Why does CHESS STALKER use cookies?
Optimise the User's browsing experience through session tracking.
Collect information to optimise navigation and improve the Website.
Mandatory or technical cookies
Firebase AuthenticationUntil you sign out
The user's signed-in session. Browser local storage (IndexedDB), not a cookie.
Google Firebase
Google Sign-InSet by Google
Cookies from accounts.google.com required to sign in with Google. Only if you choose that option.
Google
PaddleSession
Cookies of the payment process inside the Paddle window. Only when the checkout opens.
Paddle.com
Local preferences (localStorage)Persistent (until you clear site data)
Light/dark theme, language, your analytics choice, recent search history, board and Studio settings, and a cache of your latest analyses so they are not fetched again. Stored only in your browser and never sent to our servers.
Chess Stalker
SentryNo cookies
Diagnosis of technical failures in the application (IP address, browser and error trace), only when an error occurs. Sets no cookies.
Sentry (Functional Software, Inc.; data stored in the EU, Germany)
Analytics (optional)
Umami AnalyticsNo cookies
Audience measurement with no cookies or persistent identifiers on your device. It runs from the first visit on the basis of our legitimate interest in understanding how the Website is used; you can turn it off at any time with "Reject all" in the banner, and your choice is honoured in this browser.
Umami (self-hosted in the EU)
03
How to turn analytics off?
Analytics can be turned off with "Reject all" in the banner shown on your first visit, or from "Configure". Your choice is stored in this browser. To change it later, press the button below and the banner will be shown again. You can also block or delete cookies from your browser settings.
04
Acceptance
This Website only stores on your device the technical storage it needs to work. Analytics uses no cookies and can be turned off; if you decline it, the Website remains fully functional.
Última actualización / Last updated: October 2026
🍪 Cookies · Chess Stalker stores in your browser only what it needs to work (session and preferences) and measures its audience with its own cookie-free analytics. Analytics are optional.