This page explains how Alton Zhao (USATT# 273085)'s rating went from 1457 to 1480 at the 888 League event from 30 Apr 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.