This page explains how George Siu (USATT# 76618)'s rating went from 1773 to 1749 at the ICC California State Open held on - 10 May 2009. 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.