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' },
  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

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 | | o | 全local役有効 | | 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

local yaku list: | Name | 飜数 | | --- | --- | | 人和 | 役満x1 | | 大七星 | 役満x1 |

Api

• Class: Riichi
  • riichi.calc()
  • riichi.disableWyakuman()
  • riichi.disableKuitan()
  • riichi.disableAka()
  • riichi.enableLocalYaku(name)
  • riichi.disableYaku(name)

use-before-calc()

const Riichi = require('riichi')
const riichi = new Riichi('112233456789m11s+o')

riichi.disableWyakuman() //2倍役満禁止
riichi.disableKuitan() //喰断禁止
riichi.disableAka() //赤dora禁止
riichi.enableLocalYaku('人和') //人和有効
riichi.disableYaku('大七星') //大七星禁止

let result = riichi.calc()

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
  }
}