This page explains how John Nagel (USATT# 30131)'s rating went from 1554 to 1551 at the Charlotte TTC Open Benefit held on - 29 May 2005. 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.