This page explains how Arsalan Afrakhteh (USATT# 273167)'s rating went from 901 to 851 at the Tri-Valley Branch-Fremont TTA League event from 12 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.