This page explains how Timothy Richard Doerr (USATT# 5407)'s rating went from 1283 to 1272 at the 42nd St. Joseph Valley Open held on - 18 Mar 2007. 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.