This page explains how Hao Li (USATT# 131129)'s rating went from 2027 to 2020 at the San Francisco Bay Area CLC event from 15 Jan 2024. 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.