This page explains how John Romoa (USATT# 13572)'s rating went from 1386 to 1251 at the 2008 Hawaii Island Open held on - 9 Nov 2008. 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.