This page explains how Thaddeus D. Robinson (USATT# 51346)'s rating went from 1623 to 1641 at the Lechi/West Covina TTC Open held on - 20 Feb 2005. 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.