This page explains how Ilya Koshkin (USATT# 14637)'s rating went from 1624 to 1620 at the Power Pong Open held on - 7 Mar 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.