Rules

Rule guides with sample hands for each major ruleset.

The Charleston Explained
Tile passing phase in American mahjong with a sample hand.
American Mahjong (NMJL) Basics
NMJL uses 152 tiles including flowers and seasons — sample hand below.
Year Card Hands Intro
How year-based hands appear on the NMJL card with an example layout.
Hong Kong Mahjong Basics
Hong Kong scoring context with a big three dragons sample.
Chinese Mahjong (MCR) Basics
Mainland competitive mahjong context with a da san yuan example.
Pure One Suit (Qing Yi Se)
Qing yi se — all tiles from one suit — with a sample hand.
Riichi Mahjong Basics
A short introduction to Japanese riichi mahjong with sample hand patterns.
When to Declare Riichi
What riichi declaration means and a sample tenpai shape.
Riichi Scoring Basics
Intro to han and fu with a teaching hand example.
Common Riichi Yaku Overview
A quick tour of common riichi yaku with illustrated sample hands.