This page explains how David Royes (USATT# 72807)'s rating went from 1497 to 1496 at the 11th Annual Holiday Classic 2 Player Team & Top Singles (Open) held on - 16 Jan 2011. 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.