This page explains how Shant Akoubian (USATT# 219609)'s rating went from 1653 to 1620 at the GLTTC FRIDAY 730pm League event from 17 Nov 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.