This page explains how Jeffrey Cumes (USATT# 78403)'s rating went from 1231 to 1209 at the 2009 Big Island Open held on - 19 Apr 2009. 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.