How we check our guides

Every ruling shows its sources

Each answer on our rules page links to the sources we checked it against, mostly long-standing reference sites such as Tom Sloper's rules Q&A and established teaching sites. When we cannot confirm something, we soften the wording or leave it out.

House rules are labeled

Groups play slightly differently. We only offer house rules we have seen documented, and we always say when an answer reflects a house rule instead of the official rule.

We do not copy the card

The official card is published each year by the National Mah Jongg League and is protected by copyright. Every example hand on this site is invented for teaching and labeled that way.

Dates and corrections

Every guide shows the date it was last updated. When we fix a mistake, we update the page and the date.

Product mentions

Our buying guides explain what to look for. We do not claim to have tested products we have not tested, and we do not publish made-up ratings or reviews.