This page explains how Xiaofei Ren (USATT# 93563)'s rating went from 1607 to 1578 at the Swan Sunday League event from 19 Feb 2023. 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.