This page explains how Sean Sun (USATT# 280067)'s rating went from 83 to 80 at the GLTTC FRIDAY 730pm League event from 19 Jan 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.