This page explains how Ying Zhang (USATT# 90711)'s rating went from 1336 to 1278 at the Westchester April 2022 Open held on 23 Apr 2022 - 24 Apr 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.