This page explains how Kazumi Matsuyama (USATT# 272853)'s rating went from 138 to 121 at the 888 League event from 1 Oct 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.