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Can I call a discard to make a pair?

No, not in the middle of a hand. A discard may be called only to complete a pung, kong, quint or sextet of like tiles. The one exception is the fourteenth tile: if that discard completes your whole hand, you may call it for a pair or even a single and declare Mahjong.

Answered by Prim. Last reviewed 2026-09-22.

What a discard can be called for

The rule is short and it does not bend. The most recent discard may be claimed to complete a set of three or more identical tiles: a pung, a kong, a quint or a sextet. You call it, you lay the set face up on top of your rack, and it stays there for the rest of the hand.

A pair is two tiles, and two tiles are never enough to justify a call. Neither is a single. If you are holding one Four Dot and the Four Dot you want goes into the discards, you let it go and hope for the wall.

The one exception: the tile that wins

Everything changes on the fourteenth tile. If the discard in front of you is the last tile your hand needs, you may call it for anything at all: a pair, a single, a tile inside a run, the missing letter in NEWS. You are not calling for a set, you are calling for Mahjong, and Mahjong may be claimed on whatever tile completes the line.

This holds for concealed hands too. A hand marked C may make no exposures along the way, but it may still win on a discard. So may every line in the Singles and Pairs section, which is built of nothing but pairs and singles. Those hands wait patiently all game and are allowed one call, the last one.

Runs, years and NEWS follow the same rule

Anything on the card that is not a group of identical tiles counts as singles and pairs. A run of different numbers, the year, NEWS: none of them can be called from a discard to build them up, exposed on the rack, or filled with a Joker. American Mahjong has no chow at all, so a discard is never taken to finish a sequence.

Those tiles come to you from the wall and the Charleston. Only a winning tile may come from the discards.

What happens if you call one anyway

A pair laid on the rack as an exposure is an incorrect exposure, and a hand with an incorrect exposure can be called dead by any other player. There is a small mercy: a call is not final until the called tile is racked, sitting on the bottom ledge of the rack and leaning against the back, or tiles have been exposed from the hand. Catch yourself before that and you may withdraw the call.

The better habit is to count before you speak. If the tile would give you three of a kind or more, or if it would finish the hand, call. If it would give you two, stay quiet.

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