This page explains how Zhangyan Zhu (USATT# 271274)'s rating went from 1423 to 1361 at the Westchester March 2022 Open held on 26 Mar 2022 - 27 Mar 2022. The links below take you to pages that describe various aspects of the ratings processor.

The ratings 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.