Siamese Mah Jongg is the two-player answer inside the American school: a variant created by Gladys Grad in 2015 in which each player runs two racks at once and races to complete not one hand from the card but two. Everything about the tiles, the card and the jokers is standard American; what changes is the shape of the contest. If the card, the Charleston or the joker rules are unfamiliar, read the American basics guide first, because this page builds directly on it.
The setup: two racks each
Two players sit opposite each other, and each takes two racks. The deal is deliberately lopsided: East receives 28 tiles, the opposite player 27, spread across their pair of racks. There is no Charleston at all; the passing ritual assumes four hands to feed, and the variant simply removes it. From the first turn you are looking at the National Mah Jongg League card and asking a doubled version of the usual question: not «which hand am I building», but «which two».
The freedom that defines the game
The signature rule sounds small and changes everything: a player may rearrange tiles freely between their own two racks, as often as they like, for as long as those tiles are concealed. The border runs at exposure: tiles are interchangeable in the racks, never on them, so the moment a group is exposed it belongs to that rack permanently. Early on your 27 tiles are one shared pool feeding two draft hands; every exposure hardens part of the pool into a commitment. Reading which of the two hands to firm up first, and when, is most of the variant’s strategy.
Jokers, and the shield of a declared hand
Jokers follow American rules: they stand in for tiles inside groups of three or more, and a joker sitting in an exposure can be redeemed by handing over the natural tile it represents. The variant adds one protection worth knowing. When you complete your first hand, you declare it, and a declared hand is closed territory: an opponent may not exchange a joker out of any exposure inside an already-declared Mah Jongg hand. Declaring first therefore does two jobs at once — it banks half your win and locks its jokers away from raids.
How the game ends
Play continues, draw and discard as usual, until one player has declared two complete Mah Jongg hands; that player wins the game. The scoring keeps both halves interesting: the first declared hand pays its printed card value, doubled if it used no jokers, and the second hand pays double its card value, doubled again if jokerless. Throwing the tile that completes an opponent’s second hand is punished separately, with the discarder docked twenty points, so the endgame keeps its defensive tension even after the first declaration lands on the table.
Why two-player tables pick it
Plain head-to-head American play with one rack each works, but it thins the game out: fewer exposures to read, fewer jokers circulating, long silent stretches. Running two hands per player restores the density a four-seat table has naturally — more calls, more joker traffic, more information on the racks — without inventing a single new tile. It is also simply more card practice per hour: every deal makes you plan two patterns against each other. For the general question of how the classic game bends to a small table, including the Chinese-style options, see the two-player guide; where the American school itself sits among the world’s rule families is mapped in the survey of Mahjong types.
Frequently asked questions
What is Siamese Mahjong?
A two-player variant of American Mah Jongg created by Gladys Grad in 2015. Each player runs two racks and wins by completing two hands from the National Mah Jongg League card; there is no Charleston.
How many tiles does each player get in Siamese Mahjong?
East is dealt 28 tiles and the other player 27, split across each player’s two racks. Concealed tiles may be moved freely between your own racks; exposed groups are fixed where they landed.
Can jokers be taken from a declared hand in Siamese Mahjong?
No. Once a hand is declared as a completed Mah Jongg, jokers inside its exposures can no longer be exchanged, which makes declaring your first hand early a defensive move as well as a scoring one.
How do you win a game of Siamese Mahjong?
By declaring two complete hands before your opponent does. The first pays its card value, the second pays double, jokerless hands double again, and discarding into an opponent’s second win costs the discarder twenty points.
