This page explains how Xiaoyi Hu (USATT# 272606)'s rating went from 1977 to 1990 at the 888 League event from 21 May 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.