This page explains how Jiaqi Zheng (USATT# 72386)'s rating went from 2431 to 2420 at the Ping Pong Dojo event from 23 Aug 2008. 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.