This page explains how Ryan Park (USATT# 202569)'s rating went from 1576 to 1547 at the Westchester May 2019 Open held on 25 May 2019 - 26 May 2019. 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.