Mahjong Variants — Every Major Regional Ruleset Compared

Mahjong is not a single game — it is a family of games sharing a common tile set and core mechanics. As the game spread from China across the world, every region developed its own rules, scoring systems, and strategic emphases. This guide covers every major variant.

The Common Core

Before exploring differences, here’s what all variants share:

• 4 players around a square table
• Tile set with three suits (Bamboo, Characters, Dots) and honor tiles (Winds and Dragons)
• Draw-and-discard mechanic — draw a tile, discard a tile
• Set building — form sequences, triplets, and pairs
• Winning hand — complete a specific hand pattern to win
• Claiming discards — take opponents’ discarded tiles to form sets

The differences lie in what constitutes a valid win, how scoring works, special rules, and which tiles are used.

Chinese Classical Mahjong

Overview

Chinese Classical Mahjong is the closest to the original game. It is the foundation from which all other variants evolved.

Key Features

• 144 tiles: Full set including Flowers and Seasons
• Scoring: Point-based system with doubles (fan). Hands are valued based on the patterns they contain.
• Minimum requirement: Usually none or very low — even simple hands can win
• Payment: Loser(s) pay winner. Exact payment structure varies by house rules.

Typical Scoring Patterns

Strengths

• Closest to the original historical game
• Flexible — many valid winning hands
• Good for social/casual play

Weaknesses

• Scoring varies enormously by region and house rules
• Less structured for competition
• Can feel loose to players used to stricter variants

Riichi Mahjong (Japanese)

Overview

Riichi Mahjong is the most codified and competitively developed variant. It adds several rules that increase both strategic complexity and excitement.

Key Features

• 136 tiles: Flowers and Seasons are typically removed
• Yaku requirement: Every winning hand must contain at least one yaku (scoring pattern)
• Riichi declaration: A player one tile from winning can declare riichi, staking 1,000 points for a chance at bonus value
• Furiten rule: You cannot win on a tile you previously discarded
• Dora: Bonus tiles indicated by an indicator tile that add extra han (scoring units)
• Han/Fu scoring: Points calculated from han (multipliers) and fu (base points)

Unique Mechanics

Why It’s Popular

Riichi Mahjong’s strict rules and deep scoring create an extremely competitive game. The riichi declaration adds a psychological element, and the furiten rule demands constant defensive awareness. It’s the most popular variant for online play and international competition.

For a complete guide, see Riichi Mahjong.

American Mahjong

Overview

American Mahjong diverged significantly from the Chinese original and is governed by the National Mah Jongg League (NMJL), which publishes an annual card of valid winning hands.

Key Features

• 152 tiles: Standard 144 plus 8 joker tiles
• Annual card: Each year the NMJL publishes a new set of valid winning hands. Players must build one of the hands on the current year’s card.
• Jokers: Wild tiles that can substitute for any tile in a triplet or quad (but not in pairs or singles)
• Charleston: A pre-game tile exchange where players pass tiles to each other
• No chi: Players cannot call sequences from discards — only matching sets

The Annual Card

The NMJL card is the heart of American Mahjong. It lists roughly 50–60 specific hand patterns organized by categories like “Two Suit,” “Consecutive Run,” or “Singles and Pairs.” Players must study the card and identify which hands their tiles can potentially build.

Unique Aspects

• The annual card means the metagame changes every year
• Jokers create unique strategic considerations
• The Charleston adds a pre-game trading phase unique to this variant
• More accessible entry point — players only need to match card patterns

Hong Kong Mahjong

Overview

Hong Kong Mahjong (also called Cantonese Mahjong) is a fast-paced variant popular in Hong Kong, Guangdong, and overseas Chinese communities.

Key Features

• 144 tiles: Full set including Flowers and Seasons
• Minimum fan: Usually 3 fan minimum to win (prevents trivially cheap wins)
• Simple scoring: Fewer scoring patterns than Chinese Classical, making it easier to learn
• Fast pace: Games tend to be quicker than other variants

Common Fan Patterns

Why Players Like It

Hong Kong Mahjong strikes a balance between simplicity and depth. The minimum fan requirement adds strategic interest (you can’t just win any random hand), but the scoring system is much simpler than Riichi or Chinese Classical.

Taiwanese Mahjong

Overview

Taiwanese Mahjong is a distinctive variant with several unique features that set it apart from other Chinese variants.

Key Features

• 144 tiles: Full set with Flowers and Seasons, which play a significant role
• 16-tile hands: Players hold 16 tiles instead of the standard 13 (5 sets + 1 pair to win)
• Bonus tile scoring: Flowers and Seasons are much more important, with specific associations and bonus payments
• Aggressive play: The metagame encourages attacking play and fast hands
• Gambling format: Traditionally played for stakes, with a scoring system designed around it

Distinctive Elements

The 16-tile hand gives players more flexibility but also more complexity. The expanded bonus tile system means that drawing the right Flowers and Seasons can significantly affect your score.

Singaporean Mahjong

Overview

Singaporean Mahjong blends elements from Cantonese and other Southeast Asian variants with its own local innovations.

Key Features

• 148 tiles: Standard set plus 4 animal tiles (Cat, Mouse, Rooster, Centipede)
• Scoring system: Uses a tai-based system with 5 tai maximum
• Animal tiles: Unique bonus tiles with their own scoring rules
• Shooting: Special rules around who pays when a player wins

Unique Elements

The animal tiles add a layer of bonus scoring not found in other variants. The shooting rules (which determine who is liable for a player’s win) create strategic considerations around defensive play.

Competition Mahjong (MCR)

Overview

Mahjong Competition Rules (MCR) were developed to create a standardized international competition format. They are used by the European Mahjong Association and in many international tournaments.

Key Features

• 144 tiles: Full set
• 81 scoring patterns: A comprehensive list of fan-scoring patterns, from 1 fan to 88 fan
• 8 fan minimum: Hands must be worth at least 8 fan to win
• No gambling: Designed as a pure skill competition format
• Standardized rules: Eliminates regional ambiguity

Pattern Examples

Why It Exists

MCR provides a level playing field for international competition. When players from different countries meet at tournaments, MCR ensures everyone is playing by the same rules.

Variant Comparison Table

Which Variant Should You Learn?

For online play: Start with Riichi Mahjong. It has the most active online platforms (Mahjong Soul, Tenhou) and the largest international competitive community.

For social/casual play: Hong Kong Mahjong is approachable and fast. If you’re in the US, American Mahjong has a large social community.

For competition: MCR is the standard for most international tournaments outside Japan. Riichi has its own tournament circuit.

For tradition: Chinese Classical connects you to the game’s origins.

Further Reading

• Riichi Mahjong Guide — Complete guide to the Japanese variant
• Mahjong Scoring — How scoring works across all variants
• History of Mahjong — How these variants evolved
• Mahjong Rules for Beginners — The shared fundamentals