This page explains how Kwing Yiu Lau (USATT# 4097)'s rating went from 2180 to 2170 at the USATT National Championships held on - 18 Dec 1995. 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.