This page explains how Sergey Averin (USATT# 18198)'s rating went from 1537 to 1530 at the Oberlin College Open held on - 20 Nov 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.