American Mahjong Rules Explained
American mahjong follows a precise sequence: the game is set up, tiles are dealt, the Charleston is completed, and play continues through drawing and discarding until someone declares mahjong or the wall is exhausted. The annual card determines which hands are legal, while table procedures determine how players may reach those hands.
The full game in order
- Build and break the wall. Players shuffle the tiles, build walls, determine East, and deal the starting hands.
- Complete the Charleston. Players pass three tiles at a time through the required directions, followed by any optional passing.
- Begin with East. East starts with fourteen tiles and makes the first discard.
- Draw and discard. Each player normally begins a turn with thirteen tiles, draws one, evaluates the hand, and discards one.
- Call only when legal. A player may claim the most recent discard for a complete exposure or for mahjong, subject to concealed-hand restrictions.
- Declare mahjong correctly. A winning hand must match one current-card line exactly in tile identity, grouping, suit relationship, and exposure status.
Rules controlled by the card and rules controlled by play
The card controls
Winning patterns, hand values, concealed or exposed status, suit relationships, and special notes belong to the current annual card.
Gameplay controls
Turn direction, calls, exposures, joker exchanges, discard priority, and how an error is handled belong to the rules of play.
Before making any call
- Identify the exact hand and line.
- Confirm the discard completes one full group.
- Verify the hand is not required to stay concealed.
- Check whether jokers are permitted in that group.
- Expose the complete group immediately and discard to finish the turn.
The most important beginner rule
A legal hand is not merely fourteen tiles that look related. Every tile must match one printed card line exactly. Group sizes, colors, suit relationships, flowers, winds, dragons, and exposure status all matter.
Core rule questions
Can a player rearrange exposed tiles later?
No. An exposure may be corrected only while the player is making it and before the next discard is made. Once play continues, the exposure is fixed.
Can any discard be called?
Only the most recent discard is available, and it must immediately complete a legal exposure or the winning hand.
What happens when no one wins?
If the wall is exhausted without a legal mahjong, the game ends as a wall game and no player wins that hand.
Five Rule Decisions That Change a Hand
Calling or Staying Concealed
Before claiming a discard, confirm that the selected card line permits exposure and that the call completes one printed group. A useful tile is not enough by itself.
Using or Saving a Joker
Jokers may support eligible groups of three or more identical tiles, but they cannot repair singles, pairs, flowers used as singles, or an incorrect suit relationship.
Continuing or Switching Hands
A legal line can become unrealistic when required natural tiles are visible in discards or exposures. Recheck availability instead of following the first choice automatically.
Declaring or Rechecking
Before saying mahjong, count fourteen tiles and map every tile to one exact card line. A near match is not a legal win.
Correcting or Calling the Hand Dead
Minor placement errors may be correctable immediately, while a settled impossible exposure or invalid tile count may make the hand dead under the governing rules.
Beginner Rules Audit Before the First Game
- Everyone is using the same current card edition.
- The group agrees on Charleston options and courtesy-pass procedure.
- Players know which direction play moves and who begins.
- The table has agreed on scoring and house-rule variations.
- Everyone knows how long to pause for calls.
- The group knows how corrections and dead-hand questions will be handled.