This page explains how Clifford Lau (USATT# 1170683)'s rating went from 990 to 1050 at the 2021 May Open @ Princeton Pong held on 15 May 2021 - 16 May 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.