This page explains how Alex Kotlyar (USATT# 21222)'s rating went from 1659 to 1615 at the Indiana State Closed Champions held on - 24 Apr 2004. 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.