This page explains how David T Campbell (USATT# 59573)'s rating went from 1503 to 1455 at the HCTT Tuesday Night League event from 30 May 2017. 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.