This page explains how Arthur Cohen (USATT# 19551)'s rating went from 2273 to 2278 at the LYTTC Friday Pro League event from 28 Oct 2012. 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.