This page explains how Jingfan Feng (USATT# 219191)'s rating went from 1956 to 1952 at the Swan Friday O2000 Team League event from 14 Jul 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.