This page explains how Piotr Soja (USATT# 82335)'s rating went from 1922 to 1919 at the Experior Club League event from 22 Feb 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.