This page explains how Alex Kotlyarskiy (USATT# 23927)'s rating went from 1677 to 1628 at the 2002 Spintech Open held on - 31 Mar 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.