This page explains how Matthew Lu (USATT# 85535)'s rating went from 2188 to 2138 at the LYTTC Friday Pro League event from 16 Jun 2015. 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.