This page explains how Katy Lee (USATT# 224029)'s rating went from 685 to 686 at the 2023 Flow Chicago Open held on 18 Feb 2023 - 19 Feb 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.