This page explains how Matthew Lu (USATT# 85535)'s rating went from 2138 to 2131 at the LYTTC Friday Pro League event from 24 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.