Hé Fēn Mahjong

Credits & Acknowledgements

Last updated: September 2026

Hé Fēn Mahjong is built by Kojent Partners. The recognition models, rule research and typography stand on work generously shared by others — acknowledged here with thanks.

1. Tile-Recognition Training Data

• Roboflow Universe community mahjong datasets — assorted community-published tile detection and classification sets (CC BY 4.0 / MIT, per dataset) — universe.roboflow.com
• “Mahjong Dataset” by Esmond Wong — tile face images (MIT License)
• COCO-format community mahjong tile images — community-contributed detection data
• Player-contributed scans — photos shared by Hé Fēn players with explicit consent (“Keep my scans”), used solely to improve recognition

2. Rules Research

Our guides describe the rules played in Hé Fēn, including Taiwanese Classic and Club, Hong Kong New Style, Japanese Riichi and Chinese Official MCR. The reference directory links to published rulebooks and explains which versions the guides cover. Local and tournament rules may differ.

3. Typography

• Nunito — SIL Open Font License. Website font files are served locally.
• Bangers — SIL Open Font License, used in app interfaces.