This page explains how Hao An Do Ngoc (USATT# 275709)'s rating went from 1609 to 1603 at the HITTA Weekly League event from 23 Mar 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.