This page explains how Jeffry D. D. Schultz (USATT# 78166)'s rating went from 596 to 561 at the 2009 Under 1200 held on - 15 Aug 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.