This page explains how Piotr Soja (USATT# 82335)'s rating went from 1827 to 1815 at the Experior Club League event from 6 Jul 2018. 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.