This page explains how Olivia Rosin (USATT# 216225)'s rating went from 1383 to 1320 at the HITTA Weekly League event from 9 Jul 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.