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The Mahjong Guide symbolThe Mahjong Guide

Late Arrivals and Early Departures in American Mahjong

A late arrival or early departure should be handled at a natural break whenever possible. The active four players should normally finish the current hand before a seat changes. This protects private rack information, score accuracy, East assignment, and the integrity of the wall.

Use the End of a Hand as the Change Point

Mahjong, a wall game, or another formally agreed ending creates a clean transition. At that point the group can record the result, rebuild the wall, assign seats, and explain any house convention to the incoming player.

If a genuine emergency requires a player to leave immediately, pause the table and decide openly whether to preserve the rack for a substitute or end the hand without a score.

Planned Change vs. Emergency Change

Planned Change

Finish the hand, settle the score, rotate seats, and begin a fresh game with the arriving or replacement player.

Emergency Change

Stop play, protect every rack, and agree on one fair remedy before anyone reveals or moves tiles.

Welcoming a Late Arrival

  • Let the active hand finish.
  • Explain the waiting and rotation order.
  • Confirm the card edition and house rules.
  • Assign the new seat before the wall is built.
  • Reset East and scoring records clearly.
  • Avoid sharing private information from the previous hand.

When Someone Must Leave

  1. State the Timing

    Give the table as much notice as possible.

  2. Complete the Hand

    Finish normally when time permits.

  3. Settle the Result

    Record points before the player departs.

  4. Choose the Next Format

    Bring in a waiting player, use an agreed three-player variation, or end the session.

Arrival and Departure Questions

Can a substitute take over a rack?

Only by explicit agreement, preferably in a teaching or emergency situation. The substitute will inherit private information and prior decisions, so it is not the cleanest normal solution.

Should a late player watch the current hand?

Yes, if the table is comfortable with an observer and the player does not reveal reactions or offer strategy.

What happens to an unfinished score sheet?

Record the completed games and clearly mark any unscored interrupted hand so totals remain auditable.

Handle Group Changes Fairly

Rotate Players

Use a predictable waiting order.

Scorekeeping Mistakes

Keep records accurate through changes.

Table Etiquette

Manage interruptions courteously.

Keep reading

First American Mahjong Game ChecklistArrive prepared, follow the table confidently, and know which questions to ask.How to Teach American Mahjong to BeginnersIntroduce the game without overwhelming new players with every exception at once.Mahjong Turns, Calls, and DiscardsFollow normal American mahjong play and understand when a discard may be called.