This page explains how Yanyu Xie (USATT# 215584)'s rating went from 1989 to 1979 at the Central Carolinas Super League event from 29 Aug 2019. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.