This page explains how Si-Dung Lam (USATT# 65505)'s rating went from 1644 to 1630 at the Sooner State Games held on - 5 Feb 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.