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Chinese Official vs Riichi Mahjong

How Chinese Official and Riichi mahjong differ — the tile set, the hand, and above all how each one is scored.

Chinese OfficialRiichi
Also called国标麻将麻雀 / リーチ麻雀
Played inChina (competition circuit), international (WMO events)Japan, international competitive scene
Tiles144136
Flowers4 flowers + 4 seasons (8 bonus tiles)none — flower and season tiles are omitted from standard riichi sets
Jokersnonenone
Hand size1313
Scored inpoints (the "81 patterns")han + fu
Scoring systemcumulative fan-counting against a standardized 81-pattern listhan-fu scoring against a point table
Learning curveadvancedadvanced

What sets them apart

Chinese Official. Chinese Official (国标麻将 / MCR) is the standardized competition ruleset created in 1998, built around 81 fixed scoring patterns and an 8-point minimum to win — designed to replace regional house rules with one standard.

Riichi. Riichi (Japanese) mahjong is the modern competitive ruleset centered on the riichi declaration, mandatory yaku, and han/fu scoring — 136 tiles, four players, no flowers in play.

Chinese Official mahjong guideRiichi mahjong guideAll variants

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