This page explains how Weisung Tsao (USATT# 28857)'s rating went from 2145 to 2118 at the ICC Juniors and Adults League event from 1 Dec 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.