structural:expansion, quality:correction
Points

Points (terminology of which differs from variation to variation) are obtained by matching the winning hand with different criteria scoring different values. The points obtained may be modified into scores for each player using some (typically exponential) functions. Some criteria may be also in terms of both points and score.

In many variations the dealer receives no scoring bonus and does not maintain their turn by winning or a dead hand.

In classical mahjong all players score points. Points are given for sets and hand composition and winning bonuses, doubled and redoubled for basic patterns. Sometimes a loser may score more points than a winner. Japanese mahjong has a complex scoring system with several stages of scoring, rules and exceptions, evening out scores and bonus points at the end of a match. Korean mahjong has a simple scoring system where only winner scores without any form of doubling.

Some variations give points for concealed hands, in which case no melds are made except by winning on a discard.

In Old Hong Kong mahjong: