This page explains how Xiang Guan (USATT# 926351)'s rating went from 1433 to 1420 at the Swan Sunday League event from 21 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.