This page explains how Ming Zhang (USATT# 23562)'s rating went from 2259 to 2258 at the Ping Pong Dojo event from 19 Apr 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.