This page explains how Alton Zhao (USATT# 273085)'s rating went from 1251 to 1277 at the 888 League event from 12 Feb 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.