A tool for Riichi Mahjong how-to-cut (何切る) training. You can upload custom discard problems with images; manage problem sets, import or export problem collections; and practice discards after selecting modes or filtering problems. It can also be used simply as a collection and appreciation tool for gathering complex board state discards you have encountered.
Wish you continuous improvement in your Mahjong skills.
Practice makes perfect.
On the practice page, filter the desired problems and modes, then start answering. Select your discard action and tile, then submit.
You can immediately see the pre-set answers (correct/incorrect indicated by green/red borders), and the "Question" on the left sidebar will change to show "Explanation".
Also supports problems with images. Suitable for complex situations involving call judgments, point calculations. Note that the images themselves are not clickable.
The initial page for uploading problems. Here you can:
- Fill in basic information like title, background, and game info.
- Write the question and explanation.
- (Optional) Upload or paste an image.
- (Optional) Set a custom difficulty level for future reference and filtering.
- Default is 0. If set to 0, the difficulty will not be displayed in the practice interface or problem bank.
- Select Dora indicators, hand tiles, answer action, and answer tile.
The management page. Here you can:
- Browse your problem bank in list or grid view.
- Select a specific problem to modify it or view its practice statistics.
- Batch select multiple problems for operations like deletion or export.
- Export packages the corresponding data and images into a
.zipfile, saved to.../saves/export/. You can use this for backups. - Deletion cannot be undone.
- Export packages the corresponding data and images into a
- Import problems.
- Generally only accepts
.zipfiles generated by the export function.
- Generally only accepts
- Use condition filters or hand tile filters to browse only problems that meet specific criteria.
Listed from more likely to less likely:
- Improve translations and fix errors in various language versions.
- Add a stats page to view special data, like total attempts, total time spent, etc.
- Web version.
- Automated analysis of tile counts and waiting tiles, eliminating the need to manually write related explanations.
- Mobile app version.
- Image recognition for automatic hand tile input.
This project was initially created to fulfill my personal needs, so it's unlikely I will implement most of the above features... PRs are welcome if you are interested.
v0.9.1 Releases
That's a set of problems and I created that set myself. You can also find it in Releases, named
300.zip. Import this file in the management interface. Think of it as an optional built-in problem bank.Note that this problem set only contains the problems themselves, without explanations, and there might be errors due to manual entry. Some answers have been adjusted according to Naga's suggestions or include multiple correct answers. Please refer to the original "300 Problems" book and this Bilibili article for details.
Uploading a large number of problems at once can be very labor-intensive. If you need to do bulk uploads (e.g., for other problem books):
Please refer to this file. This script can help you convert a large number of
.txtformat problems (separated by newlines) into thedata.jsonformat used by this software. However, you still need to create the.txtfiles manually (and I forgot to make it require a.zipfor import, so you might need to compress it manually afterwards).
Certainly. Open
.../_internal/src/assets/tiles- that's where the tile face resources are stored. You can freely replace them as long as you keep the filename, format, and dimensions (70*100) the same.
Try resizing the window, or adjust the font size until it looks right. Then restart the software.