Flower and Season Tiles
If you pick up a flower or season tile from the wall you should reveal it immediately and pick another tile from the kong box.
Converting a Pung to a Kong
An exposed (i.e. declared) pung can be converted into an exposed kong, but only by using a tile taken from the wall. The player must then take another tile from the kong box.
Robbing the Kong
Where a player takes a tile from the wall and makes a kong from an exposed pung, another player can Rob the kong in order to go Mah-Jong. The only sets he can thereby make, however, is a chow or a Special Hand.
In the case of the chow, it can be claimed even when the player is not immediately to the right of the discarder. Robbing the Kong for a chow gives the player a double, but having a chow in the hand also causes him to forfeit one. So the double is immediately lost.
Note that an already exposed kong cannot be robbed.
One for Mah-Jong
When a player only requires one more tile to finish he must declare One for Mah-Jong.
This alerts the other players to be more careful with their discards. The player in question is said to be calling or fishing.
If you make a concealed kong by picking up the fourth tile from the wall then you should lay the 4 tiles in front of you and pick up a new tile from the kong box.
A concealed kong
An exposed pung converted to an exposed kong
Concealed Sets
Concealed sets are those that have not been obtained by claiming a chow, pung or kong.
A concealed chow is not worth anything, but concealed pungs and kongs are worth twice their exposed counterparts.
