syanten
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    1.5.0 • Public • Published

    syanten

    麻雀シャンテン向聴数牌理計算
    Japanese riichi mahjong hand shanten calculation

    Install with npm:

    # npm i syanten

    Use in browser:

    <script src="https://cdn.jsdelivr.net/npm/syanten"></script>

    Example:

    const syanten = require('syanten')
    let hai = [
        [4, 1, 1, 1, 1, 1, 1, 1, 3], //萬子
        [0, 0, 0, 0, 0, 0, 0, 0, 0], //筒子
        [0, 0, 0, 0, 0, 0, 0, 0, 0], //索子
        [0, 0, 0, 0, 0, 0, 0]        //字牌
    ]
    console.log(syanten.syanten(hai))     //一般形
    console.log(syanten.syanten7(hai))    //七対子形
    console.log(syanten.syanten13(hai))   //国士形
    console.log(syanten(hai))             //全部形最小値
    
    //手牌可能枚数: 14,13, 11,10, 8,7, 5,4, 2,1

    Output:

    -2  牌数不正
    -1  和了形
    0   聴牌形
    1~  向聴数
    

    一般型牌理計算

    const syanten = require('syanten')
    let hai = [
        [3, 3, 3, 0, 0, 0, 0, 0, 0],
        [2, 0, 0, 0, 0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 0, 0, 0, 0],
        [1, 1, 1, 0, 0, 0, 0]
    ]
    console.log(syanten.hairi(hai))

    Output:

    //手牌14,11,8,5,2枚の場合
    {
      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
    }

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

    //手牌13,10,7,4,1枚の場合
    let hai = [
        [3, 3, 3, 0, 0, 0, 0, 0, 0],
        [1, 0, 0, 0, 0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 0, 0, 0, 0],
        [1, 1, 1, 0, 0, 0, 0]
    ]
    console.log(syanten.hairi(hai))

    Output:

    //手牌13,10,7,4,1枚の場合
    {
      now: 2, //現在向聴数
      wait: {'1p': 3, '2p': 4, '3p': 4, '1z': 3, '2z': 3, '3z': 3 } //待1p三枚 2p四枚 3p四枚 1z三枚 2z三枚 3z三枚
    }

    七対&国士牌理計算

    let hai = [
        [2, 2, 2, 0, 0, 0, 0, 0, 0],
        [1, 0, 0, 0, 0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 0, 0, 0, 0],
        [2, 2, 1, 1, 1, 0, 0]
    ]
    console.log(syanten.hairi(hai, true))

    Install

    npm i syanten

    DownloadsWeekly Downloads

    31

    Version

    1.5.0

    License

    MIT

    Unpacked Size

    60.7 kB

    Total Files

    6

    Last publish

    Collaborators

    • takayama