This page explains how Roberto A. Byles (USATT# 4615)'s rating went from 2161 to 2090 at the TET Festival held on - 2 Feb 2003. 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.