This page explains how Xiayang (ray) Zhang (USATT# 87703)'s rating went from 500 to 499 at the Central Carolinas Super League event from 29 Mar 2012. 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.