This page explains how Alex Kotlyar (USATT# 21222)'s rating went from 1495 to 1487 at the SpinBlock Monday Night League event from 28 Dec 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.