This page explains how Sergey Averin (USATT# 18198)'s rating went from 1643 to 1560 at the 2010 Millcreek Giant RR held on - 28 Mar 2010. 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.