This page explains how Douglas Yi Li (USATT# 59160)'s rating went from 2025 to 2021 at the Matchpoint TTC Friday League event from 10 Dec 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.