This page explains how Zhen Jia (USATT# 83670)'s rating went from 2159 to 2148 at the Central Carolinas Super League event from 21 May 2015. 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.