This page explains how George Yang (USATT# 74240)'s rating went from 1983 to 1998 at the Spttc Saturday Night League event from 15 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.