This page explains how Ziqi Yan (USATT# 271136)'s rating went from n/a to 1989 at the Paddle Palace Club: 2021 Fall Open held on 11 Sep 2021 - 12 Sep 2021. 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.