This page explains how Koji Ishida (USATT# 273023)'s rating went from 844 to 860 at the Westchester May 2022 Open held on 28 May 2022 - 29 May 2022. 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.