This page explains how Robert Shahnazari (USATT# 10437)'s rating went from 2189 to 2172 at the Pacific Coast Open held on - 28 Aug 2011. 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.