Accuracy is the point of this site. Here is how we try to earn your trust.
How we check rules
- Each rule page cites at least two sources. Our build process will not publish a rule page without them.
- Where rule sets differ, we say so, and we name the rule set behind each example.
- Each page shows the date its rules were last reviewed.
How code checks our examples
All tiles on this site come from one data file. So when a page shows a hand, the build checks that it uses a legal number of tiles. Our trainers, quizzes, and solvers have automated tests, and these run before every update:
- 1,000 deals per Mahjong Solitaire layout are tested to be solvable.
- Waits and discards in our trainers are computed, not written by hand.
- Each quiz hand is checked as a real winning shape.
How AI is used
This site was built with AI assistance, including drafting text and producing some atmospheric images and sounds. A person is responsible for what we publish. We label anything that a knowledgeable human has yet to review in our internal records, and we update that as reviews happen. If you are an experienced player and notice a mistake, please tell us.
What we will not publish
- The hands on the National Mah Jongg League’s card, in any form, including lists of “best hands.”
- Invented authors, experts, reviews, testimonials, or statistics.
- Claims that mahjong improves your health. We give no medical advice.
- Advice on gambling, stakes, or casino games, or links to them.
- Rankings of brands or claims that we tested a product, unless we really did.
- Club listings that a person has not checked.
Our sources
We rely most often on these:
- National Mah Jongg League: About the game
- Tom Sloper’s Mah-Jongg FAQs
- European Mahjong Association: Riichi Rules 2016
- Wikipedia: Mahjong, American mahjong, Japanese mahjong, and Hong Kong mahjong scoring rules
Corrections
If we get something wrong, we fix it, and we update the page’s review date. Send corrections through our contact page.
Culture and history
We treat the game and its communities with respect. We acknowledge its Chinese origins and its long American history, including the Jewish American communities that shaped American play. We label legends as legends, and we avoid stereotypes.
Advertising
Advertising pays for this site. Advertisers have no say in what we write, and ads are kept apart from game boards and lessons. You can read more in our Privacy Policy.