This page explains how Xianliang He (USATT# 256702)'s rating went from 2016 to 1991 at the 888 League event from 19 Nov 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.