This page explains how John C. Fredrickson (USATT# 5901)'s rating went from 1555 to 1563 at the TCTTA Friday League event from 21 Dec 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.