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Vibe Chess End User License Agreement

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This End User License Agreement (EULA) is an agreement between you, whether an individual or an organisation (the User), and the rightholder, the Vibe Chess project (the Rightholder), governing your use of the Vibe Chess software.

By opening, installing on a device or otherwise using the Vibe Chess software, you accept the terms of this agreement. If you do not agree with them, do not use the software.

How we handle data is described in the privacy policy, and the rules of conduct in the service are set out in the terms of use.

On this page

  1. 1What the Software is
  2. 2Grant of licence
  3. 3What is not allowed
  4. 4Exclusive rights and confidentiality
  5. 5Third-party components
  6. 6Price
  7. 7Updates and support
  8. 8Liability
  9. 9Software provided as is
  10. 10Changes to and termination of the agreement
  11. 11Rightholder and contacts

1.What the Software is

This agreement covers the software that the Rightholder distributes under the Vibe Chess name (together, the Software):

  • the Vibe Chess app: the Telegram mini app and the web version at playvibechess.com/app(also available at vibechess.ru/app), including when added to a phone's home screen;
  • the Vibe Chess Telegram bot (@vibechessbot);
  • the chess clock at playvibechess.com/clock;
  • the tools on the playvibechess.com and vibechess.ru websites: the board editor, training tools, venue display screens and game broadcasts;
  • the documentation, instructions and other related materials, in electronic form and online.

The agreement is concluded when you start using the Software and remains in force for as long as you use it, within the term of the exclusive right.

2.Grant of licence

The Rightholder grants you a free, simple (non-exclusive) licence to use the Software. The licence is non-transferable and may not be sublicensed; it is worldwide and lasts for the term of this agreement.

The licence entitles you to use the Software for its intended purpose:

  • to play, train, record and review your games, and keep your rating;
  • to organise and run chess tournaments, meetups and leagues, including corporate events and events for which the organiser charges an entry fee;
  • to show standings, pairings and game broadcasts on a screen at the venue and to share links to them.

Full access to the features opens after you sign in with Telegram or VK ID. No keys, activation codes or payment are required.

3.What is not allowed

You may not, and may not allow others to:

  • decompile, disassemble or otherwise attempt to obtain the source code of the Software, or study how it works in order to reproduce its underlying algorithms, except where the law expressly permits this (Article 1280 of the Civil Code of the Russian Federation);
  • modify, adapt or alter the Software, its components or databases, other than through the settings the Software itself provides;
  • sell, rent out, sublicense or otherwise provide access to the Software as a product, pass it off as your own or build it into your own products;
  • bypass access restrictions, interfere with the operation of the Software or its servers, place excessive load on them, or harvest data in bulk by automated means;
  • use the Software to break the law, infringe the rights of others or violate fair play - for example, by entering results you know to be false or by passing engine moves to a player during a game;
  • enable third parties to use the Software in your name.

An organiser may charge for their own event, but not for access to the Software itself: it is free for every participant.

4.Exclusive rights and confidentiality

The Software is a result of intellectual activity. The exclusive rights to it belong to the Rightholder and are protected by the copyright law of the Russian Federation and by international treaties. This agreement grants you no rights in the Software other than the limited right of use described above. The Vibe Chess name and logo are designations of the Rightholder.

The source code of the Software and the algorithms by which it works, including how moves are processed, are the Rightholder's trade secret. Using them in breach of this agreement is grounds for terminating your licence.

5.Third-party components

The Software includes open-source components by other authors. They are governed by their own licences, and where a component's licence conflicts with this agreement, the component's licence prevails:

  • Stockfish - the chess engine used for game analysis, licensed under the GNU GPL;
  • chess.js - chess rules and move notation, licensed under the BSD licence;
  • bbpPairings - Swiss-system pairings under FIDE rules, under the project's open-source licence;
  • the maestro piece set (by sadsnake1, Lichess project) - licensed under CC BY-NC-SA 4.0.

Telegram and VK are independent services: when you sign in through them, their own terms apply.

6.Price

The Software is provided free of charge. If paid features are ever introduced, their terms and prices will be published in advance, and you will be able to use them only by your own separate decision.

7.Updates and support

The Software updates itself: the web version and the mini app always open in their current version, and you do not need to install updates. The Rightholder may add, change and remove features.

The Rightholder fixes reported bugs as quickly as reasonably possible. No exact timeframe can be promised: the Software works together with Telegram, your browser, operating system and device, none of which the Rightholder controls.

For help and questions, use the /support command in the bot or send us a message on Telegram: message us.

8.Liability

Breach of this agreement entails liability under the law of the Russian Federation.

To the extent permitted by law, the Rightholder is not liable for indirect losses, lost profits, loss of data or any other damage arising from the use of the Software or the inability to use it.

Access to the Software is protected by your Telegram or VK account, and keeping that account secure is your responsibility. Actions taken from your account are deemed to be yours until you report unauthorised access. If you suspect that someone else is using your account, message us straight away.

9.Software provided as is

The Software is provided "as is". The Rightholder does not warrant that it will meet your expectations, be fit for a particular purpose or work without interruptions or errors.

The Rightholder does not review in advance the information users post in the Software - event names and descriptions, names, photos, results - and is not responsible for it; responsibility lies with whoever posted it.

Data is stored on the Rightholder's servers and backed up regularly, but the Rightholder cannot guarantee that information will never be lost.

10.Changes to and termination of the agreement

  • The Rightholder may amend this agreement by publishing a new version on this page with the date of the update. By continuing to use the Software after the changes, you accept the new version.
  • You may stop using the Software at any time and ask for your account to be deleted by sending us a message on Telegram.
  • If you breach this agreement, the Rightholder may unilaterally terminate your licence and restrict your access to the Software.
  • If a court finds any provision of this agreement invalid, the remaining provisions stay in force.
  • If you accept this agreement on behalf of an organisation - for example, when running a corporate tournament - you confirm that you are authorised to do so on its behalf.
  • Any matter not covered by this agreement is governed by the law of the Russian Federation.

11.Rightholder and contacts

The Rightholder is the Vibe Chess project: an over-the-board chess club and an app for running chess tournaments.

Website: playvibechess.com (in Russian: vibechess.ru). For any questions about this agreement, send us a message on Telegram: message us.