This page explains how Brett Chapel (USATT# 1180498)'s rating went from 1158 to 1146 at the NTTC October 7th, 2023 league event from 7 Oct 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.