This page explains how John Mar (USATT# 5185)'s rating went from 2283 to 2265 at the 2011 Cary Cup Championship held on - 20 Mar 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.