Guan4 Dan4 is a Chinese card game whose name means throwing eggs. It originated in Huaian, Jiangsu Province and is probably the most popular climbing game in Jiangsu, Anhui and other provinces nearby.
For detailed rules in English, refer to https://www.pagat.com/climbing/guan_dan.html
This was started as a cpp program using dfs with heavy pruning optimization (lol) to calculate best (min hands) strategy for the card game, Guan Dan.
Now I've recently built a mobile friendly web app with react-native-web using the cpp module to calculate strategy. The app is published as a PWA in https://bobgy.github.io/poker-guandan-strategy/.