Only the player whose turn it is may form a chow by using the last discarded tile.
To do so the player must call chow then lay the 3 tiles face up on the table in
front of him and discard an unwanted tile.
A player can only claim one chow in a session.
By calling “pung”
Anyone who can make a pung from the last discarded tile may do so by calling pung,
laying the 3 tiles face up on the table then discarding an unwanted tile.
The turn then passes to the player on right of the one who has punged. So any intervening
players miss a turn.
By calling “Mah-Jong”
Anyone who can make Mah-Jong from the last discarded tile can do so to end the
(Of course, Mah-Jong may also come from someone picking a tile from the wall).
When there is contention
It is possible that more than one player may want to claim the same tile. The rules
of precedence are as follows:
An exposed chow
An exposed pung
A pung or kong takes precedence over a chow.
Mah-Jong takes precedence over a chow, pung or kong.
If more than one player can make Mah-Jong with the discarded tile, then the nearest
player to the right of the discarder (i.e. going in an anti-clockwise direction)