This page explains how Thong Lam (USATT# 20034)'s rating went from 1497 to 1491 at the Golden State Open held on - 28 May 2000. 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.