17 rule sets, from Hong Kong parlours and Japanese professional leagues to Sichuan teahouses, Singaporean animal tiles and the American card — how many play, how many tiles, how big the hand, and how it scores.
Want the three biggest styles side by side? See Rules compared.
American & WesternWinning hands come only from the National Mah Jongg League's annual card; the Charleston and jokers make it unique.
American & WesternThe rules developed by British clubs and writers from the 1920s, still played by some groups.
American & WesternThe doubles-based scoring of the 1920s Western rule books that introduced the game to English speakers.
American & WesternA variant named after Wright-Patterson Air Force Base in Ohio, with its own published rules, still played in some communities.