This page explains how Zaid Berrada (USATT# 86942)'s rating went from 1755 to 1720 at the Chicago Land Area Singles League event from 3 Apr 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.