This page explains how John C. Fredrickson (USATT# 5901)'s rating went from 1566 to 1550 at the TCTTA Friday League event from 18 Apr 2014. 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.