This page explains how Philip Rosin (USATT# 268857)'s rating went from 856 to 839 at the 2022 US Nationals South Central Regional Qualification Tournament - HITTA held on 3 Jun 2022 - 5 Jun 2022. 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.