Terms of Service

Effective date: 3 September 2026

These Terms of Service ("Terms") govern your use of the website at bjjmap.submissionchain.net (the "Service"), an educational Brazilian Jiu-Jitsu knowledge graph and training tool operated by YRCiou ("we", "us"). By accessing or using the Service, you agree to these Terms. If you do not agree, please do not use the Service.

1. Acceptance of terms

By accessing or using BJJ Map, you confirm that you have read, understood, and agree to be bound by these Terms and by our Privacy Policy.

2. The Service

BJJ Map is a free, educational knowledge graph and training tool for Brazilian Jiu-Jitsu. It is a static website with no user accounts and no server-side storage. The Service is currently in beta and under active development. It is provided "as is" and "as available", and its features, content, and availability may change, be interrupted, or be discontinued at any time without notice.

3. No accounts

The Service has no sign-in, no user accounts, and no cloud sync. Everything you do — flashcard progress, roll history, lists, and settings — is stored only in your own browser's local storage, on the device you are using. We never receive it. Clearing your browser storage erases it permanently, and it does not follow you to another device or browser.

4. Acceptable use

You agree not to:

• Use the Service for any unlawful purpose or in violation of these Terms;
• Attempt to disrupt, overload, or interfere with the Service or its infrastructure;
• Scrape, harvest, or bulk-download content except as permitted by the applicable content licence;
• Use the Service to infringe the rights of others.

5. Safety disclaimer — important

Brazilian Jiu-Jitsu and martial-arts training carry an inherent risk of serious injury.

The content on BJJ Map is provided for informational and educational purposes only. It is not instruction, coaching, or a substitute for training under a qualified instructor. In particular:

• Always train under the supervision of a qualified instructor, with a willing and properly prepared partner, using appropriate equipment and a safe environment.
• Many techniques described on the Service — including chokes, joint locks, and throws — can cause serious injury or death if applied incorrectly or without proper supervision.
• You assume all risk arising from practising, attempting, or relying on any technique or information presented on the Service.
• Consult a physician before beginning any physical training programme.

To the fullest extent permitted by law, we accept no liability for any injury, loss, or damage resulting from your use of, or reliance on, the content of the Service.

6. Simulation is not prediction

The roll simulation, including every success percentage, EDGE figure, and modifier, is a gameplay estimate for study purposes only. It is a model, not a measurement, and it does not predict what will happen in a real exchange.

7. No professional advice; no warranty

The Service is provided for general educational use. We make no warranty that the content is accurate, complete, current, or fit for any particular purpose. The Service does not provide medical, legal, or professional advice.

8. Intellectual property

The content of BJJ Map (text, data, and graph) is made available under the project's content licence, a PolyForm Noncommercial licence, and is free for personal, educational, and non-commercial use. The underlying site generator (Quartz) is provided under its own open-source (MIT) licence. You agree to respect the terms of the applicable licences.

9. Affiliate disclosure

Some outbound links on the Service (for example, links to instructional courses) are affiliate links. If you click such a link and make a purchase, we may earn a commission at no additional cost to you. It never changes what the graph teaches. We are not responsible for third-party websites or their content.

10. Embedded third-party content

Some pages embed video from YouTube for film study. Playing an embedded video is a request to YouTube and is governed by Google's own terms and privacy policy.

11. Limitation of liability

To the fullest extent permitted by applicable law, the Service and its operator shall not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, profits, or goodwill, arising from your access to or use of (or inability to use) the Service. Nothing in these Terms limits any liability that cannot be limited under applicable law.

12. Governing law

These Terms are governed by the law of the operator's place of residence. Nothing in these Terms removes or limits any mandatory consumer-protection rights you have under the law of your own country of residence.

13. Changes to these terms

We may update these Terms from time to time. When we do, we will revise the effective date at the top of this page. Your continued use of the Service after changes take effect constitutes acceptance of the updated Terms.

14. Contact

Questions about these Terms: github.com/YRCiou/bjjmap/issues

See also our Privacy Policy.