This page explains how Ken Parris (USATT# 71960)'s rating went from 998 to 1000 at the 2011 US Nationals held on - 17 Dec 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.