This page explains how Rick Sullivan (USATT# 13837)'s rating went from 1848 to 1827 at the ATTA CHALLENGE LEAGUE event from 19 May 2024. 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.