This page explains how Marcin Wrzoszczyk (USATT# 88361)'s rating went from 1466 to 1463 at the Summer Open held on - 28 Jul 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.