This page explains how Jingfan Feng (USATT# 219191)'s rating went from 1860 to 1854 at the 2022 FREMONT BUTTERFLY MAY OPEN held on 6 May 2022 - 8 May 2022. 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.