Lesson seven · Calls and exposures
Calling Tiles and Making Exposures
Understand when an American Mah Jongg discard may be called, what goes face up, and how a call changes turn order.
Most turns begin with a draw from the wall. A call is the important interruption: you claim the tile another player has just discarded because it completes a permitted group for your hand.
The basic call sequence
When a discard legally completes a group you need:
- Call the tile promptly and clearly.
- Take that discard.
- Place the completed group face up on the upper part of your rack.
- Discard one tile to finish your turn.
Because a call interrupts normal order, play continues from the caller rather than from the player who would otherwise draw next.
Which groups can be called?
A discard may generally be called to complete a permitted group of three or more identical tiles. The group must fit the hand you are playing from the current card.
Singles and pairs ordinarily cannot be completed from a discard unless that discard completes Mah Jongg. A hand marked concealed also restricts ordinary exposures.
What an exposure commits
An exposed group gives information to every player and cannot simply be reorganized into a different idea later. Before calling, point to the exact group on your card and check:
- Is this group exposed under the hand I chose?
- Does the discard complete this exact group?
- Will I have the correct tile count after I expose and discard?
When two players want the same discard
Calls have priority rules, and a call for Mah Jongg outranks a nonwinning call. When a dispute or simultaneous call occurs, pause and use the current governing rules instead of resolving it by confidence or speed.
Practice the language
Ask a partner to name imaginary discards. Respond with one of three phrases:
- “No call; I draw normally.”
- “Call—this completes my exposed group.”
- “I need to check whether this hand is concealed.”
The goal is to make the decision sequence familiar before it becomes urgent.