This page explains how Aaron Oliver (USATT# 249948)'s rating went from 1853 to 1838 at the 2023 ALABAMA CLOSED CHAMPIONSHIPS held on 19 Aug 2023 - 19 Aug 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.