For newsletters we transfer your email address and username to the external service MailChimp. You can unsubscribe from newsletters and as a registered user you can apply several mail settings to control how your email address is used. If you subscribe to a newsletter or are registered we would like to send you occasional updates via email. This data is processed in the external service Zendesk. If you decide to contact the support team a ticket is created with information that includes your name and email address so that we can respond to your concern. A free registration is not required to use this application. You can find this information in your personal profile. Your personal decision on which data storage to enable is also stored as necessary information (consent).įor registered users we store additional information such as profile data, chess games played, your chess analysis sessions, forum posts, chat and messages, your friends and blocked users, and items and subscriptions you have purchased. You can also enable more data fields, as described in the other sections. These have no direct relationship to your person except for the IP address currently being used and your Google Analytics identifiers. Google stores your device identifiers and we send tracking events (such as page requests) to Google Analytics.

We measure how our page is used with Google Analytics so that we can decide which features to implement next and how to optimize our user experience. We use your local storage to save the difference between your local clock and our server time (serverUserTimeOffset), so that we are able to display the date and time of events correctly for you. For example, a new chess game will not be opened in all your current tabs. Additionally, a technical field is stored (singletab) to ensure that some interactions are only processed in the browser tab that is currently active.

The only exception is that we monitor some requests with the IP address that you are currently using, so that we are able to detect malicious use or system defects. All of these fields are alpha-numeric, with almost no relation to your real identity. A security identifier (csrf) is also stored to prevent a particular type of online attack.

It contains a session ID - a unique, anonymous user ID combined with an authentication identifier (user_data). A so-called cookie stores identifiers that make it possible to respond to your individual requests. Some data is technically necessary to be able to visit the page at all.

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