This page explains how Daniel Guttman (USATT# 20650)'s rating went from 1147 to 1115 at the 2011 JOOLA N. American Teams O held on - 27 Nov 2011. 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.