This page explains how Tadeusz Alberski (USATT# 83164)'s rating went from 1645 to 1580 at the 2016 Aurora Cup held on 15 Jan 2016 - 16 Jan 2016. 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.