This page explains how Krzysztof Szostak (USATT# 88459)'s rating went from 2068 to 2025 at the Experior Club League event from 11 Jan 2020. 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.