Calls & Exposures

Focused American mahjong information for Calls & Exposures.

Incorrect Exposure Rules in American Mahjong

Identify exposure errors quickly and separate correctable placement mistakes from dead-hand situations.

Understand when a spoken call, exposed group, or discard commitment becomes final.

Understand why a pair normally stays concealed and when a winning discard may complete it.

Learn the key concealed-hand exception: you may call the final discard for Mahjong, but not an earlier discard to make an exposure.

Know when a discarded flower can complete an exposure or a winning hand.

When two players call the same discard, first check for a valid Mahjong call, then apply the governing priority rule to equal calls.

Understand exposed tile groups, legal calls, information revealed to opponents, and concealed-hand restrictions.

Understand the brief opportunity to claim a discard before play moves to the next draw.

Complete a called-tile turn without exposing, counting, or turn-order mistakes.

Keep exposed groups readable so the table can verify calls, jokers, and hand structure.

An exposure is generally a public commitment. Learn the difference between a prompt correction and trying to change the hand strategically later.

Use a quick table check to confirm that a new exposure is readable and structurally legal.