This page explains how Matthew Dziurkiewicz (USATT# 276240)'s rating went from 950 to 915 at the 2023 PolDoor Open held on 10 Jun 2023 - 11 Jun 2023. 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.