This page explains how Keigo Yamagami (USATT# 216055)'s rating went from 1909 to 2008 at the Experior Club League event from 11 Jan 2020. 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.