This page explains how John Yoon (USATT# 12659)'s rating went from 1942 to 1917 at the Experior Club League event from 23 Jun 2017. 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.