This page explains how Sung G. Yim (USATT# 63580)'s rating went from 1941 to 1931 at the Matchpoint TTC Friday League event from 7 Jun 2019. 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.