This page explains how Mengqun Li (USATT# 92976)'s rating went from 1987 to 1955 at the Austin Table Tennis League event from 16 Jun 2021. 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.