This page explains how Piotr Soja (USATT# 82335)'s rating went from 2129 to 2056 at the South Shore Sports & Butterfly Championships 2018 held on 29 Dec 2018 - 29 Dec 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.