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Can I expose a pung I drew myself from the wall, or only one I called?

Only one you called. In American Mahjong a set goes on top of your rack only when you call a discard to complete it. A pung you build from tiles you drew stays in your hand, unseen, until you declare Mahjong and show everything.

Answered by Prim. Last reviewed 2026-11-05.

Only a called discard goes on top of the rack

An exposure has exactly one way in. Another player discards a tile, you call it, and you lay it on top of your rack with the matching tiles from your hand to make a pung, kong, quint or sextet. The called tile is always part of what you show. That is the whole doorway, and there is no second one.

So the set you see on someone's rack tells you something precise: at least one tile in it came from the discards. A set built entirely from tiles drawn off the wall has never passed through that doorway, and the rules give it no reason to.

Where a pung you drew belongs

Keep it in your hand, on the sloped front of the rack with everything else. It counts toward your hand exactly as much as an exposed pung does. When the hand is finished, nobody will ask where the tiles came from. They will only check that your fourteen tiles make a line on the current card.

Beginners often lay a drawn pung out because it feels like progress, or because they think the table needs to see it. It does not. Progress you can see is progress the whole table can read.

Why hidden is the better place anyway

An exposure gives away more than it looks. Every set on top of your rack narrows the lines you could be playing, and the other players read it the moment it lands. A set kept in the hand tells them nothing.

There is a second cost. A Joker sitting in an exposure can be taken by any player holding the real tile it stands for. A Joker in your hand is yours alone. And an exposure stays where it is for the rest of the hand, so it ties you to the lines it fits, while tiles in the hand leave you free to change your mind.

When everything comes out

The moment to show a drawn pung is the moment you win. When your fourteenth tile completes a line, you declare Mahjong and lay the whole hand on top of the rack, every set and every pair, so the table can check it against the card.

That is also why a set held in the hand needs no real tile at all. It never needed a called discard, so it may be made entirely of Jokers and shown that way at the end.

New to the words? Expose · Call · Pung · Concealed