This page explains how Gal Alguetti (USATT# 83382)'s rating went from 1593 to 1563 at the 2010 US Nationals held on - 18 Dec 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.