This page explains how Sung G. Yim (USATT# 63580)'s rating went from 1988 to 1981 at the NJTTC Friday League event from 14 Dec 2018. 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.