This page explains how John G Todd (USATT# 119)'s rating went from 1617 to 1609 at the NTTC July 1st, 2023 League event from 1 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.