This page explains how Harold E. Fredrickson (USATT# 5900)'s rating went from 1137 to 1087 at the TCTTA Friday League event from 27 Apr 2012. 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.