This page explains how Ilya Bushkanets (USATT# 65222)'s rating went from 1786 to 1686 at the Atlanta Giant RR held on - 13 Nov 1999. 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.