This page explains how Tom H. Li (USATT# 37938)'s rating went from 1630 to 1624 at the Sac-Rec Winter Open held on - 31 Jan 1998. 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.