This page explains how Artur Kurek (USATT# 76969)'s rating went from 2341 to 2309 at the 2015 Butterfly Aurora Cup held on - 18 Jan 2015. 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.