This page explains how Michael Kendrick Groom (USATT# 77764)'s rating went from 493 to 667 at the 20th Bob Viducich Stiga Pacifi held on - 2 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.