This page explains how Lucille Kolnik (USATT# 10751)'s rating went from 848 to 844 at the Lake Havasu Open held on - 19 Sep 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.