This page explains how Di Yu (USATT# 92007)'s rating went from 2455 to 2393 at the Westchester February 2022 Open held on 26 Feb 2022 - 27 Feb 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.