Settings
Player profiles
Create and edit the coaches you can play against or use in simulations.
Game Styles
Save table rules and combine messy play, blanks and extra jokers.
Coaching preferences
Simulation tools
Explore coach decisions or compare strategies across many games.
Saved data
Your progress and player profiles are saved on this device and browser. Export profiles or simulation results to keep a separate copy.
2026 card · V15.7.0
American mah jongg · Learn as you play
A little guidance.
A more confident game.
Play American mah jongg with three computer opponents and a coach beside you. Learn what to keep, what to pass, and why—one decision at a time.
No sign-up needed to try it. On your phone, tablet or computer.
A little advice. A better decision.
Turn on live coaching during your game for help with passes, targets, discards and exchanges.
Find a direction
Compare possible hands and keep a useful backup in mind.
Understand your choices
Get help with passes, discards, claims and exchanges.
Learn as you play
Use optional hints, undo a move, and learn from your game review.
Make yourself at home
A few things before you start
What kind of mah jongg is this?
American mah jongg: the four-player game with a yearly card, Charleston passes and jokers. You play one seat against three computer coaches.
Can I start if I’m new to the game?
Yes. Find a short controls tutorial under Help, or choose “Learn one decision at a time” for short lessons on tiles, hands and the decisions you’ll make.
Do I need an account or a download?
You can play and learn right in your browser without signing in. Progress is saved on this device. Sign in when you want to manually save a copy to the cloud or load one on another device.
Which card does it use?
The app currently supports the 2026 American mah jongg card. Have your own authorized card handy. My Mahjong Coach is independent and is not affiliated with or endorsed by the National Mah Jongg League.
What happens to my information?
Local play stays in your browser. Cloud saves and diagnostic attachments are your choice. Read the Privacy statement or visit Privacy & data to clear device data or delete your account.
Explore Play · Today’s puzzles
Understand the tiles, the rules, and the decisions you’ll make at the table.
Work on one skill at a time. Make a choice, then compare it with the coach’s explanation.
Your rack 0 / 13 tiles
Drag to rearrange. Tap a tile to remove it.
Your rack is stored only on this device. AI photo recognition, if configured, sends the photo to the server you choose. Card patterns are supplied separately; hand definitions are locally bundled for offline use.
A quick reference for the words and symbols you’ll see while learning and playing.
- Charleston
- The tile-passing rounds before play begins.
- Natural tile
- The actual tile shown in the target hand, rather than a joker.
- Meld · pung · kong · quint
- A group of matching tiles. A pung has three, a kong four, and a quint five. Jokers may fill groups of three or more, but not singles or pairs.
- Concealed / exposable
- A concealed hand must stay hidden until Mah Jongg. An exposable hand allows eligible groups to be shown during play.
- Target / backup
- Your chosen winning pattern and alternative hands worth keeping open.
- Hand Potential
- A relative score for how well a target fits your rack and its remaining requirements. It is not a percentage chance of winning.
- Tile highlights
- Green outlines mark natural tiles you already hold. Gold dashed outlines in your rack mark usable jokers.
No matching terms. Try another word.