This page explains how Helen Hopersky (USATT# 1167464)'s rating went from 1420 to 1339 at the Westchester 2024 February Open held on 24 Feb 2024 - 25 Feb 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.