Google "how to play mahjong" and you'll quickly run into something confusing: there seem to be several completely different games wearing the same name. And there are.
American mahjong and Chinese mahjong share a family tree, but sit down expecting one and get the other and you'll be lost within about ninety seconds. Here's how to tell them apart.
Mahjong was born in China in the 1800s and arrived in the U.S. in the 1920s, where it became an instant sensation. Over the next decade, American players (many of them Jewish women in and around New York) reshaped it into something distinctly their own. In 1937, the National Mah Jongg League was founded to standardize the American game, and it's been publishing the rules and the annual card ever since.
Meanwhile, mahjong kept evolving across Asia into many regional styles: Cantonese, Shanghainese, Taiwanese, Japanese riichi, and an international competition ruleset, to name a few.
The single biggest difference is the National Mah Jongg League card. Every spring, the League publishes a new list of winning hands, grouped into sections like 2468, 369, Consecutive Run, Winds & Dragons, and Singles & Pairs. You can't just build any valid-looking hand. It has to be on the card.
That makes American mahjong feel like a puzzle: here's your target list, now solve for it. It also means there's something new to learn every single year, which is either the best part or the most maddening part, depending on who you ask.
American sets include 8 jokers that act as wild tiles in any group of three or more identical tiles. They can't be used in pairs or singles. Jokers add speed, drama, and a whole layer of strategy, including the delicious ability to swap a real tile for a joker sitting in someone else's exposure.
Chinese mahjong has no jokers. Every tile in your winning hand is the real thing.
Before the first tile is played in American mahjong, players pass unwanted tiles to each other in a set sequence: right, across, left, then optionally left, across, right, plus a courtesy pass. It's social, strategic, and a huge part of the game's personality.
Chinese mahjong has no Charleston. You play what you're dealt.
In most Chinese styles, a winning hand is four sets plus a pair, where a set can be a sequence (like 4-5-6 of one suit) or three of a kind. There's lots of freedom in how you get there, and scoring rewards how impressive your hand is.
In American mahjong, your hand must match one specific line on the card, tile for tile. Close doesn't count.
American scoring is refreshingly simple: each card hand has a set value. Win on a discard and the discarder pays double while the others pay single. Draw your own winning tile and everyone pays double.
Chinese scoring varies by region and can involve points, doubles, and special patterns. It's a fun rabbit hole, but it's a rabbit hole.
Choose American mahjong if:
Choose Chinese mahjong if:
If the card, the Charleston, and those jokers are calling your name, Bird Bam was built for you. It's made specifically for American mahjong and the current NMJL card, with practice drills and an AI coach, Bammie, to help you get good fast.
Start with our Complete Beginner's Guide to American Mahjong and American Mahjong Rules Explained, both in The Clubhouse.