MahjongScorer

MahjongScorer is a C# library to help you calculate the Han and Fu in Riichi Mahjong.

Getting Started

1. make sure you have .NET 7.0 or above installed.
2. run dotnet run in the terminal.

Examples

var handConfig = new HandConfig { Riichi = RiichiStatus.Riichi, Tsumo = true, Ippatsu = true };
var round = new RoundConfig { SeatWind = Wind.North, RiichiBets = 2 };
var rule = new RuleConfig();

var hand = Scorer.GetHandInfo("23440556m23489s", "7s", "", "8p,7m");
var pt = Scorer.GetScore(hand, handConfig, round, rule);
Console.WriteLine(pt);

Assert.AreEqual(4, pt.Han);
Assert.AreEqual(30, pt.Fu);

And you should see

Han = 4, Fu = 30, BasePoints = 1920,
Dora = 0, RedDora = 1, UraDora = 0
Yaku = [Riichi: 1, MenzenchinTsumo: 1, Ippatsu: 1]
Fu = [BaseFu: 20, Tsumo: 2, EndWait: 2]
NonDealerTsumo: 7900(+2000) - 2000, 3900

Rules

see docs/rules.md.

Special Thanks

• ArcturusZhang/Mahjong
• livewing/mahjong-calc