This page explains how Stewart Miyashiro (USATT# 85286)'s rating went from 1219 to 1209 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.