Terms of Service

These Terms of Service ("Terms") form a legally binding agreement between you ("you", "your") and ANKT SERVICES, a French simplified joint-stock company (SAS) registered under SIREN 843902156 with its registered office at 25 Rue Lenepveu, c/o WeForge, 49100 Angers, France ("we", "us", "our"). They govern your access to and use of the ChessEndingswebsite, applications, and related services (together, the "Service").

By accessing or using the Service you accept these Terms. If you do not agree with them, do not use the Service. These Terms incorporate by reference our Privacy Policy and, for purchases, our Terms of Sale.

• "Account": the personal account you create to save your progress and access certain features.
• "Service": the ChessEndings platform, including the website, web application, mobile applications, and related services.
• "Pro": the paid tier of the Service, sold as a one-time lifetime licence.
• "Lifetime licence": a one-time Pro purchase granting access to Pro features for as long as the Service is operated.
• "Content": all training positions, lessons, guides, explanations, audio, graphics, software, and other material available through the Service.

ChessEndings is a chess endgame training platform. It lets you play endgame positions against a chess engine that runs in your browser, follow guided lessons and structured journeys, practice rated random positions, review your mistakes with explanations, scan the endgames from your public online games, and track progress, achievements, streaks, and leaderboard rankings.

A free tier is available, including without an account: guest training runs entirely in your browser, subject to a daily drill limit. Creating an account preserves your progress across devices. Pro unlocks the full curriculum and advanced features described on the pricing page. Feature availability may vary between tiers and platforms and may evolve over time.

Chess training results vary from person to person. We do not guarantee any specific improvement in your rating, results, or skill level.

Pro is sold as a one-time lifetime licence. Current pricing is displayed on the pricing page and at checkout. The lifetime licence is a personal, non-transferable licence for as long as the Service operates; it has no billing cycle and never renews, and it does not guarantee that the Service will be available forever.

Payments on the website are processed by Stripe; purchases made through the Apple App Store or Google Play are processed by Apple or Google under their own terms. The full conditions of purchase, including withdrawal and refunds, are set out in the Terms of Sale.

We may change Pro pricing or features. Price changes never affect a lifetime licence already purchased.

You agree not to:

• use the Service in violation of any applicable law or regulation
• scrape, crawl, or bulk-extract content or data, or access the Service with automated tools without our written permission
• attack, overload, probe, or disrupt the Service, its API, or its infrastructure
• manipulate ratings, leaderboards, streaks, or achievements, including by submitting falsified training results
• attempt to access other users' accounts or data
• impersonate us or any other person, or misrepresent your affiliation
• upload or transmit malicious code
• share your account or use the Service to provide a competing commercial service

We may suspend or terminate accounts that violate this section (see section 13).

The Service relies on the following third-party providers:

• Stripe: payment processing on the website
• Apple App Store / Google Play and RevenueCat: distribution and in-app purchase processing for the mobile applications
• Supabase: authentication and database hosting
• Vercel: website hosting and content delivery
• Resend: transactional email delivery
• Web3Forms: contact form processing
• Google OAuth: optional sign-in with Google
• Lichess: endgame tablebase lookups and, for the scan feature, public game data; Chess.com: public game data for the scan feature
• PostHog: product analytics (if enabled)

Your use of third-party services is governed by their own terms and privacy policies. We are not responsible for third-party services we do not control. How these providers process personal data is described in our Privacy Policy.

THE SERVICE IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS. TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, OR THAT ENGINE OR TABLEBASE EVALUATIONS WILL BE CORRECT IN EVERY POSITION.

This section does not limit any warranty or guarantee that cannot be excluded under mandatory consumer law, including the legal guarantee of conformity described in section 12.

TO THE FULLEST EXTENT PERMITTED BY LAW, WE WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR LOSS OF PROFITS, DATA, OR GOODWILL, ARISING OUT OF OR IN CONNECTION WITH THE SERVICE. OUR TOTAL AGGREGATE LIABILITY FOR ALL CLAIMS RELATING TO THE SERVICE IS LIMITED TO THE GREATER OF (A) THE AMOUNTS YOU PAID US IN THE TWELVE (12) MONTHS PRECEDING THE EVENT GIVING RISE TO THE CLAIM OR (B) ONE HUNDRED EUROS (EUR 100).

These limitations do not apply to liability arising from our gross negligence or wilful misconduct, to death or personal injury caused by our negligence, to fraud, or to any liability that cannot be limited under applicable law. Nothing in these Terms limits your statutory rights as a consumer.

You agree to indemnify and hold harmless ANKT SERVICES and its officers, employees, and agents from claims, damages, and reasonable expenses (including legal fees) arising from your violation of these Terms or your unlawful use of the Service. This obligation does not apply where prohibited by mandatory consumer law.

If you are a consumer in the European Union, you benefit from a fourteen (14) day right of withdrawal on purchases and from the legal guarantee of conformity for digital content and services under Directive (EU) 2019/770, as implemented in your country. The practical details, including our refund policy (which is at least as generous as the statutory right), are set out in the Terms of Sale.

You may stop using the Service at any time and delete your account from your dashboard. We may suspend or terminate your access, with notice where practicable, if you materially breach these Terms, abuse the Service, or where required by law. If we terminate your access without cause while you have active Pro access, we will refund the unused portion of what you paid. Provisions that by their nature survive termination (including sections 6, 9, 10, 11, and 14) survive.

Deleting your account removes your profile and training data as described in the Privacy Policy; billing records are retained as required by law.

These Terms are governed by French law, without prejudice to the mandatory consumer-protection rules of your country of residence. Before any legal action, please contact us at support@chessendings.com so we can try to resolve the issue informally.

If you are a consumer in France, you may also use free consumer mediation (Articles L.611-1 et seq. of the French Consumer Code); we will provide the details of the applicable mediator on request. Disputes that cannot be resolved amicably fall under the jurisdiction of the French courts, except where mandatory rules let you sue in the courts of your country of residence.

We may update these Terms. For material changes we will give at least thirty (30) days' notice by posting the updated Terms with a new date and, if you have an account, by email or an in-product notice. Continued use of the Service after the changes take effect constitutes acceptance; if you do not agree, stop using the Service.

If any provision of these Terms is held invalid, the remainder stays in force and the invalid provision is replaced by a valid one closest to its intent. Our failure to enforce a provision is not a waiver. You may not assign these Terms without our consent; we may assign them to a successor of the Service. These Terms, together with the Privacy Policy and the Terms of Sale, are the entire agreement between you and us about the Service.

Questions about these Terms? Write to us at support@chessendings.com or via the contact page.