If you'd like to learn more about how this rating is calculated, comprehensive details are available inside the documentation. You've fourteen tiles and you will get Mahjong by getting all 14 tiles into 4 sets and a person pair. Sets of tiles are named pung or chow and they equivalent: https://mahjongblackscatter32197.ivasdesign.com/57828796/indicators-on-mahjong-black-scatter-you-should-know