This page explains how Yoshi Morioka (USATT# 33994)'s rating went from 926 to 920 at the Meiklejohn North American Seniors Open held on - 6 Jun 2010. 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.