This page explains how Daniel Guttman (USATT# 20650)'s rating went from 927 to 923 at the NJTTC Monday League event from 20 Mar 2006. 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.