How to Play American Mahjong

A step-by-step masterclass in American Mahjong mechanics, table etiquette, tile distribution, calling protocols, and declaring Mahjong.

1. Anatomy of the 152-Tile American Mahjong Set

American Mahjong utilizes exactly 152 tiles, categorised into five major functional groups:

  • Numbered Suits (108 tiles): Craks (Characters), Bams (Bamboo), and Dots (Circles). Numbers 1 through 9 with 4 identical tiles each.
  • Winds (16 tiles): 4 North, 4 East, 4 West, and 4 South tiles (compass directions).
  • Dragons (12 tiles): 4 Red Dragons, 4 Green Dragons, and 4 White Dragons (Soap).
  • Flowers (8 tiles): Decorative nature tiles used across multiple card families.
  • Jokers (8 tiles): Universal wildcards capable of completing melds of 3 or more tiles (Pungs, Kongs, Quints, Sextets). Jokers can NEVER be used in pairs or singles!

2. Table Setup, Rolling Dice & Building the Walls

Four players sit at a square table with tile racks in front of them. All 152 tiles are shuffled face down in the center. Each player stacks a double-tier wall of 19 tiles long (38 tiles per player, totaling 152 tiles) and pushes it flush against their rack pusher.

East (the dealer) rolls two dice to break the wall and deals tiles clockwise in blocks of 4 until all players hold 12 tiles. East then takes tile 1 and tile 3 from the open wall end (giving East 14 tiles), while the remaining three players receive 1 final tile (holding 13 tiles each).

3. The Charleston Exchange Phase

Before regular draw-and-discard turns commence, players participate in the mandatory Charleston passing ritual. Players pass sets of 3 unwanted tiles around the table in a fixed geometric order to hone their hands toward a target pattern on the NMJL card.

4. Turn Order: Draw, Call, or Discard

Play proceeds counter-clockwise around the table starting with East:

  1. Draw: The active player draws the top tile from the working wall end.
  2. Evaluate: The player inspects their hand to decide whether to integrate the tile or set it aside.
  3. Discard: The player places one tile face up in the table center and clearly names it aloud (e.g. "Five Bam").
  4. Calling a Discard: Any opponent may immediately call "Call" or "Pung/Kong" for the freshly discarded tile to complete an exposed meld (Pung, Kong, Quint, or Sextet). Calling is not permitted for singles or pairs unless completing the entire 14-tile hand for Mahjong.

5. Joker Swapping & Strategic Exchanges

During your active turn—after drawing a tile from the wall and before discarding—if an opponent has an exposed meld (Pung, Kong, Quint) on their rack containing one or more Jokers, you may swap that Joker by placing the matching natural tile into their exposure and placing the Joker onto your own rack.

6. Declaring "Mahjong" & Payout Scoring

When a player assembles all 14 tiles strictly matching an exact line on the official card, they announce "Mahjong" and expose their entire hand on the top surface of their rack. If the winning tile was drawn from the wall (self-drawn), all other three players pay double the base point value. If won on a discard, the discarder pays double while the other two players pay single value.

7. Dead Hand Penalties: The 4 Critical Violations

  • Incorrect Tile Count: Holding fewer or more than 13 tiles (14 on your turn).
  • Exposing on Concealed (C) Hands: Calling an exposure when your hand is marked (C).
  • Illegal Joker Usage: Using a Joker for a single tile or in a pair.
  • Impossible Exposed Pattern: Exposing a combination that cannot lead to any valid line on the current NMJL card.