This page explains how Sina Asadallahi (USATT# 87492)'s rating went from 2200 to 2158 at the Boston TTC event from 1 Jan 2019. 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.