This page explains how Sorin Astalus (USATT# 263903)'s rating went from 1561 to 1521 at the Matchpoint TTC Friday League event from 13 Aug 2021. 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.