This page explains how Cameron Luo (USATT# 27961)'s rating went from 1638 to 1621 at the Kentuckiana League event from 3 Aug 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.