This page explains how Siyu Zheng (USATT# 280003)'s rating went from 73 to 51 at the HITTA Weekly League event from 19 Aug 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.