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Can I add a tile to an exposure I already made, like turning a pung into a kong later?

Only on the turn you made it, and a call has two parts that lock at two different moments. The tile first: you may still withdraw a call until the called tile is racked or you have exposed tiles from your hand, and after that the tile cannot be given back. Then the exposure: until you discard, you may still change it, a pung into a kong or back, Jokers in or out. Once your discard is down the exposure is locked for the rest of the hand, and no later tile, drawn or called, can be added to it.

Answered by Prim. Last reviewed 2026-09-28.

Part one: the tile

Every call has two parts, and the rules never let you tell one without the other. The first part is the tile. Saying "call" does not commit you, and neither does touching, lifting or holding the discard. Until the called tile is racked, resting on the ledge of your rack and leaning against the back, or until you have exposed tiles from your hand, you may change your mind: the tile goes back to the discards and play goes on.

Once either of those has happened, you are committed. The called tile stays with you and cannot be given back. You will hear of tables where a touched tile is a taken tile; that is stricter than the League, and a tournament may set it as its own rule, but it is not the rule on the card.

Part two: the exposure, one turn wide

Being committed to the tile is not being committed to the shape. You have called, you have laid the set on top of your rack, and for a moment the exposure is still soft clay. Until you discard, you may reshape it. Three tiles may become four if you hold the fourth. Four may go back to three. A Joker may go in, or come out again, and the tiles may be rearranged around the one you called. The called tile itself stays in the set.

Then you discard, and the clay sets. From that moment the exposure is fixed for the rest of the hand. The window also closes early if you complete a Joker exchange on that same turn, so make your adjustments first.

Why a later tile cannot join

Suppose you exposed three Sevens of Dots and, two turns later, draw the fourth. It does not go up beside the other three. It stays in your hand, where it is simply a tile you hold. Nor may you call a discard to grow an exposure that is already there. A call is for completing a new pung, kong, quint or sextet, and the set you are building must come from the call and your own hand together.

This is why the decision at the moment of the call matters so much. If your line wants a kong, expose a kong, using a Joker if you must. Exposing three and hoping to add the fourth later is a plan the rules will not honour.

The one change that still happens

A locked exposure can still see one kind of traffic: the Joker exchange. Any player holding the natural tile a Joker stands for, you included, may on their own turn swap that natural in and take the Joker out. The set keeps its size and its shape. Nothing has been added and nothing has been taken away; a tile has simply been traded for its twin.

That is the whole of it. No growing, no shrinking, no rearranging after the discard. What is on your rack is what the table will see when the hand is done.

If the exposure no longer fits

A locked exposure does not lock the hand you are playing, only the set itself. You may still change hands, so long as every exposure already on your rack fits the new line. If a kong you meant for one hand also works for another, you may turn towards it freely.

What you may not do is alter the exposure to suit the new hand. If it fits no line on the card, another player may call your hand dead, and you will spend the rest of the deal playing defence in dignified silence.

New to the words? Expose · Exposed · Kong · Joker exchange