This page explains how Jean Helmick (USATT# 37258)'s rating went from 1222 to 1217 at the 1998 Midwest & Illinois Closed held on - 21 Nov 1998. 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.