This page explains how Peter Tian (USATT# 81608)'s rating went from 1973 to 1965 at the San Francisco Bay Area CLC event from 5 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.