This page explains how Sung G. Yim (USATT# 63580)'s rating went from 1974 to 1957 at the NJTTC Thursday Adv League event from 20 Feb 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.