This page explains how Basil C Ibegbu (USATT# 74880)'s rating went from 1658 to 1690 at the Aurora TTC League event from 15 May 2008. 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.