This page explains how Charlie Zhao (USATT# 272395)'s rating went from 1563 to 1559 at the Central Carolinas Super League event from 31 Aug 2023. 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.