Mahjong Decoded

Scorers and rule references for every mahjong variant, demystified

Content

HTML Table ScorerSingle device, switch seats to enter each hand and track a full 16-hand series. Choose Chinese Classical, Hong Kong Old Style, or Singaporean.
HTML Visual Hand BuilderTap tiles to build a hand and see it scored live, with no manual checkbox hunting. Choose Chinese Classical, Hong Kong Old Style, or Singaporean.
HTML Multiplayer ScorerOne device per seat, synced live via a shared room code. Chinese Classical only.
HTML Single Player ScorerScore just your own hand, with no payout matrix or other seats. Choose Chinese Classical, Hong Kong Old Style, or Singaporean.
HTML Reference CompendiumScoring reference sheets for multiple rule sets: Babcock's Standard Rules, Chinese Simplified, Chinese Classical, Hong Kong Old Style, Singaporean, Official Mahjong Competition Rules (MCR), and Zung Jung.