This page explains how Elaine Dancis (USATT# 79457)'s rating went from 719 to 721 at the Potomac 2015 Fall Open held on - 15 Nov 2015. 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.