This page explains how Adar Alguetti (USATT# 83381)'s rating went from 2183 to 2178 at the Westchester 2013 January Open held on - 27 Jan 2013. 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.