This page explains how Sam Gershkovich (USATT# 270037)'s rating went from 959 to 955 at the AZ PTTC Monday event from 29 Mar 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.