This page explains how Sam Hsieh (USATT# 124821)'s rating went from 2041 to 2030 at the San Francisco Bay Area CLC event from 27 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.