This page explains how Arthur Cohen (USATT# 19551)'s rating went from 2311 to 2310 at the 2010 JOOLA N. American Teams O held on - 28 Nov 2010. 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.