This page explains how Sam Gershkovich (USATT# 270037)'s rating went from 908 to 909 at the AZ PTTC Monday event from 1 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.