This page explains how David DeMay (USATT# 16850)'s rating went from 1602 to 1515 at the 2016 Hawaii Island Open held on 4 Nov 2016 - 6 Nov 2016. 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.