This page explains how Dave Fulcomer (USATT# 5937)'s rating went from 1663 to 1618 at the 2023 USATT Pennsylvania State Championships held on 12 May 2023 - 13 May 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.