This page explains how Matthew Lu (USATT# 85535)'s rating went from 2070 to 1991 at the LYTTC Friday Pro League event from 13 Sep 2014. 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.