This page explains how PRESTON NIAN ZE YU (USATT# 277358)'s rating went from 281 to 272 at the HITTA Weekly League event from 29 Jul 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.