This page explains how Sean Sun (USATT# 280067)'s rating went from 66 to 58 at the GLTTC FRIDAY 730pm League event from 22 Sep 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.