Classic Online Mahjong
Play classic 4-player Mahjong online for free against smart AI — no download needed. Learn how to play with built-in rules for all 9 variants, from Chinese Standard and Japanese Riichi to American Mahjong.
Mahjong Rules Guide
Select your preferred variant and learn its unique rules
Chinese Standard Mahjong Rules
Modeled on the World Championship MCR standard, with simplified win checks and scoring for casual play
OOverview
Modeled on Chinese Standard Mahjong (MCR), the international competitive standard used by the World Mahjong Championship. Win validation and scoring are simplified from the full rules for casual online play.
TTiles
Uses 136 tiles (no flowers): three suits (Characters, Dots, Bamboo, 1-9), four winds (East, South, West, North), and three dragons (Zhong, Fa, Bai).
WWinning
Simplified checks: any standard hand (four sets plus a pair) or Seven Pairs can win. The official 8-fan minimum and 81-pattern table are not enforced.
SScoring
Simplified scoring of base × 2^fan: common patterns (Pinfu, All Pungs, Full/Half Flush, All Simples, Self-Draw, Concealed Hand, Dragon Pungs) add up as fan.
Special Rules
Chow, Pung and Kong are all allowed, and you can win either by self-draw or off an opponent's discard. Ready declarations, flower-pig checks and other MCR fine print are not implemented.
How to Play Mahjong
Mahjong is a four-player tile game: you draw and discard tiles, working toward a complete hand. The core loop below is shared by every variant — what differs is scoring, special hands, and which claims are allowed.
- 1
Build the wall and draw 13 tiles
Four players stack the tiles into a wall and draw 13 apiece (the dealer starts with 14). Your goal is to shape those tiles into a complete hand.
- 2
Draw one, discard one
On your turn, take one tile into your hand, then discard one face-up. Keep the tiles that fit your target hand and let the rest go.
- 3
Claim discards to complete sets
When another player discards a tile you need, you can claim it — usually to complete a set of three identical tiles, a suited run of three, or, where rules allow, other combinations. Each variant sets its own limits on claiming.
- 4
Complete the hand and declare a win
A standard winning hand is four sets plus one pair. When a tile completes the shape, you declare your win and the hand is scored.
The 9 supported variants — Chinese, Japanese Riichi, Sichuan, Hunan, Hong Kong, Singapore, Taiwan, Guangdong and American — each score differently and allow different claims. Pick one in the rules guide above; new players usually start with Chinese Standard.
Mahjong Variants
Nine rule sets, one table — here is what makes each one different.
Korean Mahjong (한국 마작)
Traditional two-suit mahjong from Korea: no bamboo, no chow, and a 2-fan minimum win with flowers and ready declarations.
Chinese Standard Mahjong
Modeled on the World Championship MCR standard, with simplified win checks and scoring for casual play
Japanese Riichi Mahjong
Japan's most popular competitive variant with riichi declaration and dora system
Sichuan Mahjong
Blood battle to the end: play continues after each win, and one suit must be declared void at the start.
Hunan Mahjong
Zhuan zhuan style, 2-5-8 as pair, flexible and varied
Hong Kong Mahjong
Classic Cantonese style, fan-based scoring, suitable for all ages
Singapore Mahjong
Hong Kong-style play with 152 tiles, plus animal tiles that pay out instantly
Taiwan Mahjong
16-tile hand, tai scoring system, highly strategic
Guangdong Mahjong
Chicken-Ping-Hu rules, tui dao hu style, Lingnan specialty
American Mahjong
Joker tiles, Charleston exchange, Western innovation
Frequently Asked Questions
Have another question? Let us know.
What Mahjong rules are supported?
The game supports 9 rule sets: Chinese Standard (MCR), Japanese Riichi, Sichuan, Hunan, Hong Kong, Singapore, Taiwan, Guangdong, and American Mahjong with Jokers. You can switch between them in the game settings.
Is this multiplayer or single player?
This is a single-player game where you play against intelligent AI opponents. You can start a game instantly without waiting for other players.
How do I play?
Select your preferred rule set and click start. The interface is intuitive, allowing you to click or drag tiles to discard/play.
Is it free to play?
Yes, this online Mahjong game is completely free and runs directly in your browser with no downloads required.
What devices are supported?
The game works on desktop computers, tablets, and mobile phones through your web browser. No app download is required.
How does the scoring system work?
Scoring varies by rule set: Chinese Standard uses MCR competition scoring, Japanese Riichi uses fu and fan with dora tiles, Sichuan plays fast blood-battle scoring, and American Mahjong follows the annual NMJL card.
Can I save my progress?
Game progress is automatically saved in your browser. You can continue where you left off when you return to the game.
Are there tutorials for beginners?
Yes, the game includes comprehensive tutorials covering basic rules, scoring, and advanced strategies for different rule sets.
Explore Game Details
Legends of the Sparrow: The Origins
From Granaries to the High Seas
The most compelling origin story of Mahjong links it to the protection of royal granaries in ancient China. The game's name, originally 'Ma Que' (Sparrow), refers to the birds that would steal the grain. The entire game was designed as a metaphor for the workers' battle against these pests.
In this interpretation, the 'Bamboo' (Tiao) tiles represent strings of captured sparrows (or the copper coins paid as rewards). The 'Dots' (Tong) represent the grain barrels or the cross-section of birdshot guns. The 'Characters' (Wan) denote the monetary reward units (Myriads). Even the wind tiles represent the importance of wind direction when firing at birds.
Another grand legend attributes the invention to Admiral Zheng He during his 15th-century naval expeditions. To keep his sailors occupied and prevent mutiny during long voyages, he created the game using simplified concepts. 'Bamboo' represented the fleet formations, 'Dots' the fresh water barrels, and the 'Winds' the crucial sailing directions. The 'Red Dragon' symbolized the Emperor's mandate, while the 'White Dragon' was a blank slate for the unknown sea.
Decoding the Tiles: Cultural Symbolism
Philosophy in 144 Tiles
A standard Mahjong set is a universe in miniature. The three suits—Dots, Bamboo, and Characters—represent the essentials of life: sustenance, commerce, and society. The four Winds (East, South, West, North) ground the game in the physical world, representing space and direction.
The 'Dragon' tiles are particularly rich in meaning. The Red Dragon (Hong Zhong) literally means 'Center' or 'Hit', symbolizing success and achievement (often associated with the Confucian virtue of benevolence or passing imperial exams). The Green Dragon (Fa Cai) means 'To Get Rich', representing prosperity and growth. The White Dragon (Bai Ban) represents purity, the unknown, or a blank slate—a philosophical void from which all things arise.
Together, these tiles form a system that balances luck and skill, reflecting the Chinese philosophical view of fate: you cannot control the tiles you are dealt (Heaven's will), but you can control how you play them (Human effort).
From Paper to Bone: A Historical Evolution
The Transformation of a National Pastime
Mahjong did not start with the clicking tiles we know today. Its ancestors were paper card games like 'Ma Diao' (hanging horse) and 'Yezi' (leaf game) popular in the Ming Dynasty. These games used similar suits but were fragile and difficult to handle in windy conditions.
The transition to block tiles—made from bone, bamboo, and eventually plastic—revolutionized the game. It allowed for the unique mechanics of 'stacking' and 'wall building' (representing the Great Wall or city walls) that define Mahjong today. This physical change also introduced the satisfying auditory and tactile experience that is now inseparable from the game's appeal.
By the early 20th century, Mahjong exploded in popularity, spreading to Japan (where it evolved into the complex Riichi style) and the West (where it became a craze in the 1920s). Today, it is one of the few games played globally with standardized international rules (MCR) recognized by mind sports organizations.
More Than a Game: The Ultimate Mind Sport
Cognitive Science & Social Connection
In 2017, the International Mind Sports Association (IMSA) officially recognized Mahjong as a world mind sport, joining the ranks of Chess, Bridge, and Go. This was a validation of what players have known for centuries: Mahjong is a rigorous mental workout.
Playing Mahjong engages multiple cognitive domains simultaneously: memory (tracking discarded tiles), pattern recognition (identifying potential hands), probability assessment (calculating risk), and strategic planning. Observational studies have linked regular play with slower cognitive decline in older adults, but the causal evidence is not settled, and it should not be treated as a medical prevention for dementia.
Beyond the brain, Mahjong is a powerful social adhesive. The 'square table' is a space of equality where status matters less than skill. It forces face-to-face interaction, conversation, and emotional exchange, serving as a vital antidote to social isolation in the digital age.
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