This page explains how Wei Qin (USATT# 215793)'s rating went from 1427 to 1427 at the San Francisco Bay Area CLC event from 10 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.