This page explains how David Trykall (USATT# 73055)'s rating went from 1538 to 1490 at the 2009 "Think Spring" Tournament held on - 15 Feb 2009. 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.