This page explains how David Lam (USATT# 85278)'s rating went from 2063 to 2048 at the NJTTC Friday League event from 15 Feb 2019. 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.