This page explains how Alan Chen (USATT# 88147)'s rating went from 1915 to 1913 at the LYTTC Friday Pro League event from 21 Feb 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.