This page explains how Wei Qin (USATT# 215793)'s rating went from 1427 to 1428 at the San Francisco Bay Area CLC event from 3 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.