American Mahjong Rules for Beginners: Learn NMJL in 15 Minutes

The Game Everyone's Learning (and You Can Too)

American mahjong — the version played with the National Mah Jongg League card, often called NMJL mahjong — has never been more popular. Walk into any community center, cruise ship lounge or family game night and you'll hear the click of tiles. But watch four players passing, claiming and calling "Mah Jongg!" and it's easy to assume the game takes years to learn.

It doesn't. The tile-slinging looks chaotic, but underneath it American mahjong is a race with clear, simple rules: draw a tile, keep what helps your hand, discard what doesn't, and be the first to complete a hand from the official card. This guide walks through every rule a beginner needs — in about fifteen minutes — and shows you where to practice for free, online, against AI or with friends.

What Makes American Mahjong "American"?

Mahjong arrived in the United States from China in the 1920s and quickly became a national craze. In 1937, a group of players formed the National Mah Jongg League to standardize the rules — and that framework, refreshed a little every year, is what Americans play today.

Two features set American mahjong apart from the Chinese and Japanese versions:

• You play to the card. Your hand only wins if it matches a line on the current-year NMJL card. No card, no game — the card is your recipe book of winning hands.
• Eight jokers are in play. Wild tiles that can stand in for any tile inside big combinations make American hands bolder and more explosive than their Chinese cousins.

What's in the Box: The 152 Tiles

Every American set contains exactly 152 tiles:

• The three suits — 108 tiles. Characters (often called craks), bamboos (bams) and dots, numbered 1 through 9, with four copies of each tile.
• Winds — 16 tiles. East, South, West and North, four of each.
• Dragons — 12 tiles. Red, Green and White, four of each. The white dragon is usually a blank tile, affectionately known as "soap."
• Flowers — 8 tiles. Used only by card hands that specifically call for them.
• Jokers — 8 tiles. Your wild cards.

New players spend their first few games simply getting faster at reading the tiles — that's completely normal, and it comes quicker than you'd think.

The Card Is the Heart of the Game

In most mahjong variants you build generic sets. In American mahjong you must build one specific hand, chosen from the official NMJL card, which is refreshed every year. Think of each line on the card as a recipe listing the exact combinations your final 14 tiles must contain:

• Pung — three identical tiles (three 5-dots, for example)
• Kong — four identical tiles
• Quint — five identical tiles (only possible with the help of jokers)
• Run — three consecutive numbers in one suit (like 4-5-6 of bams)
• Pair — the two-tile combination most hands finish with

The card's colors carry meaning too: a combination printed in a single color can be built in any one suit, while combinations printed in two or three colors must be built in different suits. Winds and dragons appear as letters — E, S, W, N and R, G, Wh — so they're never confused with suit colors.

Setting Up: Seats, Walls and the Deal

Four players take the four wind seats — East, South, West and North — around a square table. All 152 tiles are shuffled face down and built into four walls, two tiles high, framing the center. East is the dealer: the dice roll decides where East breaks the wall, and everyone draws 13 tiles. East begins with 14.

Players stand their tiles upright on a rack so only they can see them. From this moment your mission is fixed: turn your tiles into one complete recipe from the card.

The Turn: Draw, Decide, Discard

Play moves counterclockwise in a simple rhythm:

1. Draw a tile from the wall and add it to your rack.
2. Decide — does this tile move you toward your hand?
3. Discard one tile face up into the center, announcing what it is ("5 bam").

Discards pile up in the middle of the table and are public information. Every throw tells the table a story — reading those stories is half the fun, and eventually, half the strategy.

Claims: When You Can Take Someone's Discard

You can't grab just anything. You may claim a discarded tile only when it completes:

• a pung, kong or quint for your hand, or
• your entire winning hand — the moment you call "Mah Jongg!"

When you claim for a combination, those tiles go face up on the top of your rack. This is called an exposure, and it comes at a price: once you expose, you're locked into that hand for the rest of the game, and everyone at the table can see your direction and defend accordingly. A claim for Mah Jongg always beats any other claim; if nobody claims, the next player simply draws from the wall.

The Charleston: Three Passes Before Play Begins

Before the first discard, American mahjong has a beloved ritual: the Charleston. After the deal, everyone chooses three tiles and passes them around the table:

1. First Charleston: pass three tiles to the right, then three across, then three to the left.
2. Second Charleston: pass three to the left, then three across, then three to the right.

Many tables finish with an optional "courtesy" pass of up to three tiles across, if all four players agree. You're also allowed a blind pass — including tiles you've just received without studying them first. The Charleston is your one big chance to trade the hand you were dealt toward a hand you can actually win, so use every pass.

Jokers and Flowers: The American Twist

Jokers are wild, with one big restriction: they can substitute only inside a pung, kong or quint — never as a single tile and never as a pair. And here's the fun part: any player holding the real tile may swap it for a joker that's already exposed on someone's rack, stealing the wild tile for their own hand.

Flowers have no suit. When you draw one you don't need, simply note it and keep drawing — you'll only keep flowers on your rack if your chosen hand actually calls for them.

Calling "Mah Jongg" and Winning

The moment your 14 tiles complete a line from the card — whether by your final draw or by claiming a discard — you call "Mah Jongg!", reveal your hand, and the round ends. Everyone checks your hand against the card; checking is polite and expected, not an accusation.

Scoring is refreshingly gentle on beginners: the card lists each hand's value, some lines carry a doubler, and the dealer pays and collects double. The full arithmetic matters in league play, but for your first games, knowing "winner gets paid by the table" is all you need. If the wall runs out with no winner, it's a wall game — tiles are washed and redealt.

Seven Beginner Tips That Shorten the Learning Curve

1. Choose your hand early. After the Charleston, commit to a card line. Dithering between two hands is the #1 beginner time-waster.
2. Keep pairs hidden. Showing the table exactly which hand you're building invites defense.
3. Watch the discards like a hawk. Two 7-dots already thrown? Your 7-dot pung is probably dead — switch plans early.
4. Don't expose just to expose. Every exposure commits you and warns opponents. Make it count.
5. Save jokers for kongs and quints. Burning a joker on a pung you could build naturally is usually a waste.
6. Count to 14 constantly. Every winning hand is exactly 14 tiles. Beginners who count win more.
7. Play fast, learn faster. Your first games will be slow — around game ten, everything clicks.

The Fastest Way to Learn: Play Online, Free

Rules you read are rules you forget. Rules you play are rules you own — and you don't need to gather four people around a table to start. Our free online American mahjong game runs the full NMJL rule set right in your browser, with no download and no sign-up:

• Play solo vs AI. Set up your table against AI opponents and play complete games — deal, Charleston, draws, claims, jokers, calling Mah Jongg. Built-in tips and a scoreboard help you see what good decisions look like while you learn.
• Play with friends. Create a room, share the invite code, and bring in up to three friends from anywhere — perfect for practicing before your first in-person game night.

Play American mahjong online free →

And if reading tiles is still your bottleneck, warm up with a few rounds of mahjong solitaire or the tile memory game — five minutes a day and the symbols become second nature. For a deeper reference on scoring and edge cases, our complete how-to-play guide has you covered.

Beginner FAQ

How many tiles are in American mahjong?

152 — the three suits (108 tiles), the four winds (16), the three dragons (12), eight flowers and eight jokers.

Is American mahjong harder than Chinese mahjong?

It's different rather than harder. Playing to the card makes the goal very concrete — you always know exactly which 14 tiles you need — while jokers make big hands possible even for newcomers.

Can I use a joker as any tile?

Almost. Jokers work inside pungs, kongs and quints only — never as a single tile and never as one of a pair.

How long does a game take?

A single round runs 15–30 minutes once you know the rules, and a full table usually plays several rounds in an afternoon. Online games against AI move even faster.

Ready for Your First Game?

You now know more American mahjong than most people who've watched it for years: the 152 tiles, the card, the deal, the Charleston, claims, jokers and how a winner is crowned. The only step left is the fun one — play your first game online for free, against AI tonight and with friends this weekend. Mahj on!