This page explains how Matthew Lu (USATT# 85535)'s rating went from 1400 to 1331 at the LYTTC Friday Pro League event from 20 Oct 2012. 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.