This page explains how Sergey Tsvor (USATT# 25053)'s rating went from 2081 to 2030 at the Swan Sunday League event from 23 Sep 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.