This page explains how Tahl Leibovitz (USATT# 59922)'s rating went from 2413 to 2407 at the Spinathon held on - 25 May 2008. 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.