This page explains how Randall Medcalf (USATT# 64482)'s rating went from 2121 to 2115 at the Houston League event from 16 Nov 2004. 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.