This page explains how Dmitri V Fomin (USATT# 2818)'s rating went from 2047 to 2042 at the Boston TTC event from 25 Feb 2020. 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.