This page explains how Jeffrey Cumes (USATT# 78403)'s rating went from 1559 to 1492 at the 2017 Hawaii Island Open held on 3 Nov 2017 - 5 Nov 2017. 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.