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What Is American Mahjong?

A hundred-year-old Chinese game that Americans took apart and rebuilt. Five minutes to understand what makes it different.

July 31, 20264 MIN READ
On this page
  1. The three things that make it American
  2. What it isn't
  3. What a game looks like
  4. Is it hard?
  5. Who plays it
  6. What to learn first

Mahjong arrived in America in the 1920s and became a craze almost immediately. Then something unusual happened: instead of playing it the way it came, Americans rewrote it.

They added jokers. They removed runs. They published a list of legal hands and started changing that list every year. What's left shares its tiles with the Chinese game and almost nothing else.

The three things that make it American

1. The card

Every year the National Mah Jongg League publishes a card listing the hands you're allowed to win with. You can't win with any other combination, however elegant. Every player at the table needs their own copy.

And the list changes annually, which means everybody — beginners and forty-year veterans alike — relearns the game each spring. It's the single most distinctive thing about the American version and the thing new players find strangest.

2. Jokers

JOKER JOKER JOKER JOKER JOKER JOKER JOKER JOKER
Eight jokers. No Chinese set contains any.

A joker stands in for any tile inside a group of three or more. Never in a pair, never alone. They make the card's harder hands reachable, and fighting over them is most of the mid-game.

3. The Charleston

Before anyone plays, everybody trades tiles — three at a time, face-down, in a fixed pattern of passes. It gives everyone a chance to shed rubbish and steer toward a hand.

1 First Right required 2 First Across required 3 First Left blind pass OK 4 Second Left only if all agree 5 Second Across only if all agree 6 Second Right blind pass OK 7 Courtesy 0–3, across only THE ORDER, TOP TO BOTTOM
The first three are compulsory. The middle three only happen if nobody objects. The courtesy pass always comes last — even when the second Charleston was skipped.

What it isn't

AMERICANCHINESEJAPANESE Tiles in the set 152144136 Jokers 8nonenone* Runs (chow) neveryesyes Fixed list of hands yes — annual cardnono Opening tile exchange Charlestonnonenone * Japanese sets use red fives, which are not wild cards.
The three games share tiles and almost nothing else. If you already play one of the other two, the American column is your list of habits to unlearn.

Two things to unlearn if you've played mahjong elsewhere.

There are no runs. You cannot claim a discard to make 1-2-3. Sequences do not exist. Every legal grouping is made of identical tiles.

It isn't solitaire. The tile-matching game on your phone shares the artwork and nothing else. This is a four-player game with claiming, betting and a great deal of talking.

What a game looks like

Four players, a rack each, 152 tiles.

19 stacks 2 tiles high × 4 walls = 152 ACROSS YOU LEFT RIGHT
Each player builds a wall 19 stacks long and two tiles high in front of their own rack. Four of those is the whole set — 152 tiles.

You shuffle face-down and each build a wall. Dice decide where to break it. Everyone is dealt thirteen tiles — East gets fourteen and starts by discarding one.

Then the Charleston. Then play goes counterclockwise: pick a tile, decide, discard, name it out loud. Claim other people's discards when they complete a group. Trade for jokers when you can. First person to assemble fourteen tiles matching a line on the card says "mahjong" and gets paid.

1 Pick or claim 2 Mahjong? check the card 3 Joker exchange optional 4 Discard + name it YOUR TURN 14 tiles in your hand during the turn. 13 after you discard.

A game runs about twenty minutes. Four games — one with each player as East — makes a round, and most tables play for an evening rather than to a fixed finish.

Is it hard?

The rules are easy. The card is the work.

You can learn the mechanics in an hour — tiles, passing, claiming, discarding. What takes longer is reading a card fluently enough to look at thirteen random tiles and see which three lines you might actually reach. That's a season, not an evening.

The good news is that nobody expects otherwise, and the annual card reset means the gap between you and the regulars is smaller than in most games.

Who plays it

Historically, and famously, American Jewish women — mahjong clubs became a fixture of mid-century social life and many of today's players learned from a grandmother. That's still the backbone of the game.

It's also, currently, growing fast in directions it hasn't grown before: younger players, new clubs, sets designed to look good on a coffee table rather than hide in a closet. If you're arriving now, you are not late.

What to learn first

  1. The tiles — so the table stops looking like noise.
  2. The Charleston — the part that scares everybody.
  3. Jokers — where they work and where they don't.
  4. Your card. Buy one, and read it with a real hand in front of you.

Want the four sheets, beside the rack?

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One more click. We have sent you a confirmation email — open it and confirm, and the sheets follow straight after. It takes a second and it is what keeps this list clean.

Where this comes from

Rules follow the American Mah-Jongg Association's published rulebook. The League's own materials confirm that it supplies the annual hands and rules card, that the hands change each year, and that the American game uses more tiles than the Chinese one.