This page explains how Jianzhong Lu (USATT# 203053)'s rating went from 1617 to 1617 at the Westchester December2023 Open held on 29 Dec 2023 - 30 Dec 2023. 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.