Jokers in American Mah Jongg

A joker in American Mah Jongg is a wild tile that can stand in for another tile, but only inside a group of three or more identical tiles. A standard set has eight of them, and they are the main reason the American game is gentler on beginners than its Chinese parent: a joker can rescue a group you would otherwise be stuck waiting on.

How many, and where they come from

A standard American set includes eight jokers, part of the 152 tiles you play with. Boxes often hold a couple of spares, so you may count ten in the tray. Jokers are an American invention: the Chinese game has none, and neither does Japanese Riichi.

What a joker can do

A joker can substitute for any tile inside a group of three or more identical tiles: a pung (three), a kong (four), and, when a hand on the card calls for it, a quint (five) or a sextet (six). Quints and sextets only exist because of jokers, since a set holds just four of any real tile. Whether a particular group can use jokers, and how many, is set by the line you are playing on the card.

What a joker cannot do

A joker cannot be a single tile, and it cannot be half of a pair. Any hand on the card that needs a single or a pair needs real tiles in those spots. This one limit shapes most joker strategy: pairs and singles are where you are exposed, because no wild can cover them.

Redeeming a joker

Jokers do not have to stay where they land. On your own turn, if you hold the real tile that a joker is standing in for in any exposed group on the table, yours or another player's, you may swap your real tile for that joker and take the joker into your hand. A joker in hand is more flexible than a fixed real tile, so redeeming one is often worth doing.

The jokerless bonus

Finishing a hand without using a single joker is usually worth more. The exact bonus varies by table and by year, but the idea is constant: a clean hand, built only from real tiles, is harder, so it pays better. The card has the final say on what any hand is worth.

Where it fits

Jokers are one piece of the American game, an American layer added to a Chinese one. If you are shopping for a set, the single most important thing to confirm is that it is an American set that includes the jokers; many cheap sets are Chinese ones without them.