This page explains how Kazumi Matsuyama (USATT# 272853)'s rating went from 139 to 131 at the 888 League event from 25 Sep 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.