If you're looking to contribute, translations or otherwise, please see the contributing guidelines for instructions.

This is a collection of tools designed to improve the play of Riichi Mahjong players. It includes an efficiency trainer to help players identify the best tile to discard, a replay analyzer to check the efficiency (and safety, if relevant) of a player's discards, an all-last trainer to assist with comebacks, and a few random utilities.

When referring to efficiency here, we're referring to ukeire, which is the tile acceptance of the hand in the present. There's no look-ahead for future efficiency. Ukeire is an easily measurable thing, and playing towards ukeire is sufficient for many players when combined with adequate defensive play. These tools are primarily aimed at people below Tokujou on Tenhou, and most Mahjong Soul players.

See the itch.io page for more information.

For Programmers:

This project was bootstrapped with Create React App. Make sure to run npm install, everyone's favourite command.

Available Scripts

In the project directory, you can run:

npm start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

npm run build

Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.

The build is minified and the filenames include the hashes.
Your app is ready to be deployed!

See the section about deployment for more information.