This page explains how Alan Chen (USATT# 88147)'s rating went from 2190 to 2187 at the LYTTC February Open held on - 1 Feb 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.