This page explains how Kelvin Lee (USATT# 216968)'s rating went from 1420 to 1412 at the 2024 Flow Chicago Open held on 3 Feb 2024 - 4 Feb 2024. 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.