This page explains how Yangui Tao (USATT# 34560)'s rating went from 1284 to 1234 at the Ping Pong Dojo event from 11 Feb 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.