This page explains how Peter Chung (USATT# 31990)'s rating went from 1568 to 1542 at the Ping Pong Dojo event from 29 Sep 2011. 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.