This page explains how Matthew Heister (USATT# 276539)'s rating went from 1237 to 1239 at the Westchester February 2023 Open held on 18 Feb 2023 - 19 Feb 2023. 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.