This page explains how Zhen Jia (USATT# 83670)'s rating went from 2129 to 2121 at the Central Carolinas Super League event from 23 Oct 2014. 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.