This page explains how Emma Jiao (USATT# 271481)'s rating went from 1992 to 1940 at the HITTA Weekly League event from 10 Dec 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.