Mahjong/Types of Faan/All Simples

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All Simples, also widely known as Tan'yao (Japanese:断么（タンヤオ）, Tan'yao or 断么九（タン​ヤオチュー）, Tan'yaochuu), is a basic faan of Mahjong.

Introduction

Template:Mahjong hand All simples is an extremely common yaku in riichi mahjong. The occurrence rate of this yaku is the second highest among all yakus, right after riichi.

A winning hand contains this yaku when it has no terminals or honors.

Due to its simplicity, it can only add 1 han to one's hand. However, thanks to the existence of doras, one can simply reach mangan with a combination of tanyao and 3 or more doras.

For the same reason, all simples is preferred and welcomed by newbies. Though it's easy to make a hand of "Tanyao nomi (のみ nomi, only)", it's not that frequent to see in high-level tables for its low cost-effectiveness.

All simples is also frequently used when one wants to end another's dealer or block others' high-cost hands. There's this saying in China, "No matter how good your hand is, a tan'yao will end it all (功夫再高，也怕断幺)".

Hatsune Miku's fully concealed hand, full flush, all simples and pure double sequence
Truth: Triple yakuman containing all green and four concealed triplets (single waiting)