NAGA, Mortal, Bigcoach — compare three mahjong AIs on one screen. A free review tool for Mahjong Soul / Tenhou replays.
📖 How to useLoading…
What is Mahjong AI Combo?
A free tool that shows the recommendations of three mahjong AIs for the same replay, side by side. Positions where the AIs disagree are exactly the ones worth studying — you’ll see options a single AI wouldn’t show you.
The three AIs
- NAGA — A mahjong AI analysis service by Dwango Co., Ltd. (this tool shows the values of the “Nishiki” model)
- Mortal — An open-source mahjong AI (by Equim). Free analysis on the mjai-reviewer site
- Bigcoach — An analysis service by Kyoko@mj
Features
- Compare all three AIs on the same position (bars above the hand + a recommendation table)
- Jump straight to your moves that an AI rated low (possible mistakes)
- NAGA’s tenpai probability and dangerous-tile display for opponents
- Free, no signup. Your list is stored only in your browser — no personal data on the server
- Available in Japanese, English, and Simplified Chinese
FAQ
- Is it free?
This tool is free. Use of each AI service is subject to that provider’s terms. - Does it run the analysis for me?
No. You analyze on each AI service yourself, then register the result URLs — this tool merges them into one screen (respecting each service’s rules). - Does it work on phones?
Yes, it works in mobile browsers. Landscape orientation is recommended.