Riichi

麻雀飜符手役点数計算
Japanese riichi mahjong hand calculation

Install with npm:

$ npm i riichi

Usage

const Riichi = require('riichi')
const riichi = new Riichi('112233456789m11s')
console.log(riichi.calc())

Output:

{
  isAgari: true,
  yakuman: 0,
  yaku: { '一気通貫': '2飜', '一盃口': '1飜', '門前清自摸和': '1飜' },
  noYaku: false,
  han: 4,
  fu: 30,
  ten: 7900,
  name: '',
  text: '(東場南家)自摸 30符4飜 7900点(3900,2000)',
  oya: [ 3900, 3900, 3900 ],
  ko: [ 3900, 2000, 2000 ],
  error: false
}

"m,p,s,z" means "萬子,筒子,索子,字牌"
"1z-7z" means "東南西北白發中" "0m" means "赤5萬"

自摸 & 栄和:

new Riichi('112233456789m1s1s') //自摸
new Riichi('112233456789m1s+1s') //栄和

副露:

new Riichi('1s+1s+123m55z666z7777z') //副露:123m順子 5z暗槓 6z明刻 7z明槓

Dora:

new Riichi('112233456789m1s1s+d12s') //Dora: 1s 2s

new Riichi('112233456789m1s1s+u12s') //Uradora: 1s 2s

new Riichi('112233456789m1s1s+n3') //Nukidora 3 (interrupts)

new Riichi('112233456789m1s1s+xm1') //Extra Yakuman 1

new Riichi('112233456789m1s1s+xy3') //Extra Yaku 3 Han

new Riichi('112233456789m1s1s+xd3') //Extra Dora 3 Han

Extra Option:

new Riichi('1s+1s+123m55z666z7777z+d12s+trihk22') //Extra:trihk22

Option	Meaning
t	天和/地和/人和
r(l)	立直
i(y)	一発
w	w立直
h	海底摸月/河底撈魚
k	槍槓/嶺上開花
22	場風南自風南

場風自風:

1234=東南西北
default: 場風東自風南

new Riichi('112233456789m1s1s+1') //(場風東)自風東
new Riichi('112233456789m1s1s+21') //場風南自風東
new Riichi('112233456789m1s1s+24') //場風南自風北

Settings

local yaku list:

Name	飜数
人和	役満x1
大七星	役満x2
大数隣	役満x1
大車輪	役満x1
大竹林	役満x1
紅孔雀	役満x1
黒一色	役満x1
百万石	役満x1
一色三順	3飜/2飜
三連刻	2飜
五門斉	2飜
十二落抬	1飜

const Riichi = require('riichi')

const defaultSettings = {
  allLocalYaku    : false,
  localYaku       : [],
  disabledYaku    : [],
  multiYakuman    : true,  // cap at 1 yakuman total
  wyakuman        : true,  // double yakuman (suuankou tanki etc.)
  kuitan          : true,  // open tanyao
  aka             : true,  // akadora
  sanma           : false, // 3 players
  sanmaBisection  : false, // on tsumo, lose points (false) or bisect North points (true)
  noYakuFu        : false, // calculate fu with no yaku
  noYakuDora      : false, // add dora with no yaku
  doubleWindFu    : false, // +2/+4 fu for double wind
  rinshanFu       : true,  // +0/+2 fu on rinshan tsumo
  kiriageMangan   : false, // round 1920 basic points up to mangan
  kazoeYakuman    : true,  // >13 han is yakuman else sanbaiman
  ryuuiisouHatsu  : false, // require hatsu for ryuuiisou
  otakazePei      : false, // north is always yakuhai
}

const riichi = new Riichi('112233456789m11s', defaultSettings)

向聴数牌理計算 lib

console.log(new Riichi('111222333m11p123z').calc())

Output

{
  ...
  hairi: {
    now: 1, //現在向聴数
    '1m': {},
    '2m': {},
    '3m': {},
    '1p': {},
    '1z': { '1p': 2, '2z': 3, '3z': 3 }, //打1z 待1p二枚 2z三枚 3z三枚
    '2z': { '1p': 2, '1z': 3, '3z': 3 }, //打2z 待1p二枚 1z三枚 3z三枚
    '3z': { '1p': 2, '1z': 3, '2z': 3 }  //打3z 待1p二枚 1z三枚 2z三枚
  }
}

Shamaoke/riichi

Riichi

Usage

Settings

向聴数牌理計算 lib