This page explains how Sumin Lee (USATT# 91475)'s rating went from 1784 to 1783 at the Westchester July 2022 Open held on 30 Jul 2022 - 31 Jul 2022. 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.