This page explains how Janusz Franeczek (USATT# 26185)'s rating went from 2231 to 2218 at the Experior Club League event from 21 Dec 2019. 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.