Taiwanese Mahjong · 2 tai

All Exposed (Quan Qiu Ren) in Taiwanese Mahjong: Tai, Examples and Odds

In Taiwanese mahjong, all exposed (全求人, quan qiu ren — "ask everyone", listed in the tai table as "All sets claimed") is worth 2 tai: all five sets are chowed, punged or exposed kongs, one tile is left in your hand for a pair wait, and you win on someone else's discard. Every set was "asked for", and so was the last tile. The same hand self-drawn is Half Exposed.

The rules for All Exposed

• All five sets are claimed chows, pungs or exposed (or added) kongs; one tile left in hand
• The winning tile is someone else's discard; a self-draw is half exposed
• A concealed kong rules it out: you drew those four tiles yourself
• It's always a pair wait, so there's no extra single wait

How All Exposed is scored

The tai below are computed live by the same scoring code the game uses (dealer and dealer-streak tai are added on top).

Common combinations:

How it relates to other hands

• Half Exposed: the same five claimed sets self-drawn score self-drawn 1 + half exposed 1, 2 tai in total, but all three opponents pay.
• Single Wait: always a pair wait, already part of all exposed, not added.
• All Pungs: punging all five sets gives All Pungs plus all exposed — the most common bigger version of this hand.
• Half One Suit, dragon pungs: claimed sets still count for suit and honor tai.
• Concealed Hand: the exact opposite — nothing claimed, won on a discard.

All Exposed odds

We let four computers play 12,000 hands on this site's table (normal level); 11,677 of them ended with a win, and all exposed appeared in only 1 — far too few to give a meaningful rate.

The computers claim a lot, but they're usually ready and winning after two or three claims, and rarely get to a fifth. Human tables see it rarely too: with all five sets showing and one tile in hand, others can tell what you're waiting for and seldom throw it.

Hard to make, hard to defend

• Your wait is obvious: five sets on the table and one tile in hand make it easy to guess your pair wait, so that tile won't come out.
• The weakest defence there is: with only two tiles to choose from, you have to push when someone else is ready. Making one or two extra claims for all exposed is often how a deal-in starts.
• Not worth chasing on its own: it's only 2 tai more than an ordinary claimed hand, at the cost of all your defence. It usually happens when you're going for All Pungs or Half One Suit and keep punging to the end.
• Choose your pair wait: if you do get there, wait on an honor or a terminal 1 or 9 — tiles others are more willing to throw.

To try it, open a table of online Taiwanese mahjong — the computers play with you and count the tai for you.

All Exposed in other mahjong styles

• Chinese Official (Guobiao): "Melded Hand", 6 fan, also all sets claimed and a pair wait won on a discard (Guobiao fan list)

FAQ

How many tai is all exposed?

In Taiwanese mahjong all exposed is worth 2 tai: all five sets claimed and a pair wait won on someone else's discard.

Does all exposed also add single wait?

No. One tile left is always a pair wait, and that's already part of all exposed.

Can all exposed be self-drawn?

A self-draw isn't all exposed but half exposed: self-drawn 1 tai + half exposed 1 tai.

Does a concealed kong still count as all exposed?

No. The four tiles of a concealed kong were drawn yourself, so not every set was claimed.

Related hands

Half Exposed 1 tai All five sets claimed and a self-drawn pair wait: 1 tai plus 1 for the self-draw. The difference from All Exposed and common mistakes. Single Wait 1 tai Only one tile can win — 1 tai. Edge, closed and pair waits, false single waits, and how often it happens. All Pungs 4 tai Five pungs and a pair, no chows allowed — 4 tai. Examples, scoring combos and how many pairs you need to go for it.