This page explains how John G Todd (USATT# 119)'s rating went from 1604 to 1580 at the NTTC July 29th, 2023 League event from 29 Jul 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.