This page explains how Piotr Soja (USATT# 82335)'s rating went from 1931 to 1858 at the Experior Club League event from 12 Jan 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.