This page explains how Piotrek Dumin (USATT# 1175892)'s rating went from 1245 to 1213 at the NorthSide TTC Spring Classic 2024 held on 20 Apr 2024 - 20 Apr 2024. 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.