This page explains how Don Ray Hamilton (USATT# 27945)'s rating went from 2090 to 2065 at the 2023 USATT Ohio State Championships held on 29 Dec 2023 - 30 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.