This page explains how Brad Z Bao (USATT# 270440)'s rating went from 993 to 991 at the Spttc Saturday Night League event from 7 Oct 2023. 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.