This page explains how Si-Dung Lam (USATT# 65505)'s rating went from 1666 to 1611 at the Texas Wesleyan Open held on - 16 Feb 2013. 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.