This page explains how Zhaorui Ding (USATT# 276640)'s rating went from 525 to 509 at the HITTA Weekly League event from 25 May 2024. 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.