Siamese Mahjong Rules for Two Players

Siamese mahjong rules create a documented two-player adaptation of American Mah Jongg®. Each player manages two racks and aims to complete two card-based hands. It is not the same as casually removing two seats from Chinese mahjong, and the published format deliberately changes the wall, deal, Charleston, joker exchange, end condition, and scoring.

Siamese mahjong setup

Each player sits opposite the other with two standard racks or one double Siamese rack. Build two full walls in front of each player. Under the creator’s published procedure, each wall is 19 stacks long and two tiles high.

East rolls one die to cut the first wall. Both of East’s walls are used before play moves clockwise to the opponent’s walls. Tournament rules require built walls; a loose pool is described only as a social option.

Deal 27 tiles to each player

Players deal four tiles at a time until both have 27. Unlike a four-player American deal, East does not receive an extra tile during the deal. East draws the 28th tile from the wall to begin and then discards.

Each player can arrange concealed tiles across both personal racks. This flexibility is the central puzzle: one tile may change which two card lines are realistic.

There is no Charleston

The official two-player rules omit the Charleston. Do not add a right-across-left exchange from ordinary American play. With only two players and 27 concealed tiles each, the information and tile distribution are already different.

Normal play alternates between the two players. A turn starts with a wall draw or legal claim and ends with a discard.

Build and expose two hands

Use the current NMJL card or the applicable Siamese card named by the rules. Concealed tiles may move between your two racks while you plan. Exposures must be placed with the hand they support; combining exposures on the wrong rack can make a hand dead.

Once a player declares and exposes a complete 14-tile Mah Jongg, that hand remains visible. The player continues with the remaining tiles and tries to complete the second hand. The game ends when one player has declared two Mah Jonggs or when the playable walls are exhausted under the published end procedure.

Jokers and exchanges

American joker limits still matter: jokers belong in eligible pungs, kongs, or quints, not singles or pairs. Siamese rules also address exchanges involving your own and your opponent’s exposures. A joker in an already exposed completed Mah Jongg is no longer available for exchange.

Review the joker examples before playing with two live racks per person.

Because joker procedure has several edge cases, use the live rule page rather than memorizing a shortened social summary.

Scoring the two wins

The first declared Mah Jongg receives its card value. The published rules apply additional treatment to jokerless hands, a player’s second Mah Jongg, simultaneous double wins, wall games, and discard responsibility. These details can change, so copy the current scoring section into the table’s reference pack instead of using an old handout.

For a teaching game, track card points on paper and settle only after the round. This keeps attention on tile count, rack ownership, and legal exposures.

Common Siamese mistakes

• Starting a Charleston out of four-player habit.
• Giving East 28 tiles during the deal instead of drawing the 28th to begin.
• Mixing exposed groups between the two hands.
• Exchanging a joker out of a completed exposed Mah Jongg.
• Treating a concealed win left in the sloped rack as already declared.

Count both racks together after every call. A player normally holds 27 tiles between turns and 28 after drawing or claiming, before the discard.

Primary rules reference

• The creator’s Rules for Playing Siamese Mah Jongg for 2 Players is the primary source for the walls, 27-tile deal, no-Charleston rule, two-hand procedure, joker exchanges, and scoring updates.
• Use the American mahjong rules for the annual card and base set terminology.
• If you want a Chinese-style house adaptation rather than this named format, use the separate two-player mahjong guide.

Format rule: Siamese is its own published two-player game. Do not fill gaps by guessing from four-player American mahjong.