This page explains how David C. Zeitlen (USATT# 279722)'s rating went from 988 to 906 at the 2023 USATT North Carolina State Championships held on 20 Oct 2023 - 22 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.