This page explains how John Yoon (USATT# 12659)'s rating went from 1985 to 1983 at the Experior Club League event from 31 Jan 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.