Declaring Mahjong, and What Happens in a Wall Game

To declare Mahjong in American mahjong, you complete a 14-tile hand that matches one line on the current year's card exactly, then say "Mahjong" and show your hand to the table. Holding plenty of good tiles does not win the game; finishing one exact hand does, followed by saying so out loud. This guide covers what a winning hand is, how to declare it, what happens if you declare by mistake, and what a wall game is when nobody wins.

Key takeaways

• A winning hand is 14 tiles that match one line on the card exactly: the right tiles, grouping, suits and concealed or exposed form.
• You can complete a winning hand by drawing the tile or by calling a discard, but never a discarded joker.
• Say "Mahjong," show your whole hand, and let the table check it.
• An incorrect declaration makes your hand dead, which means you can no longer win or call a discard (most groups also stop jokers being exchanged).
• If the wall runs out and nobody declares Mahjong, the hand is a wall game: nobody wins and no Mahjong is scored.

What a winning hand is

In American mahjong, a winning hand is 14 tiles that match one line on the card for that year. The National Mah Jongg League publishes a new card each year, and it lists every legal hand for that year. The hands change from year to year, so always use the current card. A line fixes several things at once:

• the tiles themselves, such as which numbers and which winds;
• the grouping, meaning how many tiles in each pair, pung or kong;
• the suits, which the card shows by color on most lines;
• the form, meaning whether the line is concealed (C) or allows exposed sets (X).

A near match does not count, and neither do the same tiles arranged differently. If you are new to the card, start with what the mahjong card is, then learn how to read the symbols in card colors mean suits.

Imagine a made-up line built from several groups of matching tiles plus a pair, adding up to 14 tiles. All 14 tiles must fit that shape exactly. A hand that has 13 of the right tiles and one that is slightly off is not yet a winning hand.

How to declare Mahjong

Step by step

1. Complete the hand. Your 14th tile finishes a line. You can complete it by drawing the tile yourself, or by calling a discard. A discarded joker can never be called, and a Mahjong call beats any other call.
2. Say "Mahjong." Say it clearly, so everyone hears it.
3. Show the hand. Turn your rack around, or lay the tiles face up, so the whole hand is visible.
4. Let the table check it. This is normal, not an insult, and it protects everyone.

Drawing the winning tile or calling it

There are two ways to finish. If you draw the last tile you need, you declare instead of discarding. If another player discards it, you can call it right away, before the next player has racked a draw, started a joker exchange or discarded. Because winning is the one exception to the "sets only" idea, you can take that discard even when it finishes a pair or a single. More detail is in calling a discard.

Concealed lines and called tiles

On a concealed (C) line, you may not have exposed any sets, but the winning tile itself can still be a called discard. If you want to understand how that works, read C or X: concealed and exposed hands.

A worked example

Imagine a made-up game. You are chasing a line that you know well, and your rack holds 13 tiles that match all but one. You need a single more tile to finish a pair.

On your turn, you draw. You glance at the new tile, then at the card, and your heart beats a little faster. It is the tile you wanted. Instead of discarding, you say "Mahjong," turn your rack around and show the hand in groups, matching the line on the card.

The other three players lean in. One reads the card line aloud while another counts your tiles: 14. Everything matches, the grouping is right, and the suits are right. Your Mahjong stands, and the hand is over.

Here is a second version. You have the same 13 tiles, but you are not sure the line allows the tile you need to be the last tile of a pair. Before you speak, you check the card against your rack. That quick pause is wise, because declaring wrongly makes your hand dead.

If you call it wrong

An incorrect declaration makes your hand dead. A dead hand can no longer win or call discards, and most groups also stop it from exchanging jokers. Whether other players may still take jokers from a dead player's exposed sets varies, so agree on it. Other things can also make a hand dead, such as a wrong tile count, a joker used in a pair or single, or an invalid exposure.

What a dead player does next is a house-rule detail. Groups differ on whether a dead player keeps drawing and discarding, so agree on that in advance. The safest habit is to check your hand against the card carefully before you speak, and to remember that a calm double-check is never a bad move.

Also check your joker use. A joker standing in a pair or a single is a common reason for a wrong declaration. You can review those limits in jokers: what they can replace.

The wall game

Sometimes nobody gets there. When the last tile has been drawn and discarded and nobody declares Mahjong, the hand ends as a wall game. Nobody wins, and no Mahjong is scored.

The players then build fresh walls and start a new hand. Who deals it is a house-rule detail, so agree on it before you play rather than during an awkward moment.

A wall game is not a failure. It simply means the tiles ran out before any player completed a line. If you want to know how the wall is built in the first place, see building the four walls.

Common mistakes

• Declaring on a near match. Only an exact match to a card line wins.
• Using a joker in a pair or a single. That makes the declaration wrong and the hand dead.
• Using an old card. Hands change every year, so check you have the current card.
• Counting wrongly. A winning hand is 14 tiles, so count before you speak.
• Hiding the hand. Show the whole hand and let the table check it.
• Arguing about the next dealer. Agree on this before the game to avoid disputes.

Quick reference

Try it at your next game

When you think you have a winning hand, pause for five seconds. Count 14 tiles, read the card line aloud, and check each joker against the pair-and-single rule. Doing this every time turns a risky moment into a reliable habit.

Frequently asked questions

How do you say Mahjong in American mahjong?

You simply say "Mahjong" when your 14th tile completes a line, then show your hand to the table. Let the other players check it against the card.

What happens if you declare Mahjong by mistake?

An incorrect declaration makes your hand dead. You can no longer win, call discards or exchange jokers. Whether you keep drawing and discarding is a house rule.

What is a wall game in mahjong?

A wall game happens when the last tile has been drawn and discarded and nobody declares Mahjong. Nobody wins, and no Mahjong is scored.

Can you win on a discarded tile?

Yes. You can call the most recent discard to complete your winning hand, even if it finishes a pair or a single. The one exception is a discarded joker, which can never be called.

How many tiles are in a winning hand?

14. That is 13 tiles plus the winning tile, counting any exposed sets.

Who deals after a wall game?

Groups differ, so decide this before you play. The next hand starts with new walls.

For the official card and rulebook, see the National Mah Jongg League.

Keep reading

• What is the mahjong card?
• Calling a discard
• C or X: concealed and exposed hands
• Jokers: what they can replace
• Building the four walls

These guides follow the way American mahjong is commonly played with the National Mah Jongg League card. Groups sometimes add house rules, so agree on yours before the first hand, and always use the current year's official card. SOLMAY is not affiliated with the NMJL.