This page explains how Qiuxia Zheng (USATT# 1166443)'s rating went from 1969 to 1987 at the San Francisco Bay Area CLC event from 28 Feb 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.