This page explains how Tomasz Szacilowski (USATT# 87789)'s rating went from 1511 to 1465 at the Vernon Hills Summer Open held on - 24 Aug 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.