Terms of Use

Content

All guides on OpenMahjong are provided free for personal, non-commercial use. You may link to any page freely. Bulk reproduction or republishing of content without written permission is not allowed.

Accuracy & house rules

Mahjong rules vary — sometimes wildly — by region, table and era. Our guides describe the most common published ruleset for each variant, but your local table's house rules always take precedence. Content is provided "as is" without warranty; we are not liable for points lost, chips owed or friendships strained by rule disputes.

Acceptable use

Do not scrape the site aggressively, resell its content, or use it to train commercial models without permission. Personal learning, classroom use and citation with attribution are all explicitly welcome.

Third-party services

The site uses third-party advertising and analytics services, each governed by its own terms and privacy policy. See our Privacy Policy for details.

Contact

Questions about these terms: hello@openmahjong.net