This page explains how Keith Carson (USATT# 221111)'s rating went from 1042 to 1027 at the 2023 Valley of the Sun Open held on 2 Dec 2023 - 3 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.