This page explains how Sergey Averin (USATT# 18198)'s rating went from 1577 to 1550 at the Martin's Buffet "Left-Overs" O held on - 24 Feb 2002. 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.